: Keeping and caring for collections

Documenting the Past - The Tomlin archive

15 February 2010

John Read le Brockton Tomlin was one of the most highly respected shell collectors of his time. Amgueddfa Cymru holds both his extensive shell collection and his archive of correspondence.

It is an archive not only of scientific history, capturing a bygone era of collecting, but also a personal insight into the lives of some of the most famous shell collectors of the day.

The archive is estimated to contain well over a thousand documents dating from the early 1800's through to the mid 1900's. It is a collection of all of the correspondence between Tomlin and his many shell associates around the world.

Many interesting discoveries have been made whilst cataloguing this archive. It has brought into focus aspects of the lives of collectors, recounting expeditions and voyages, personal illness and hardship, war, dinner invitations and Christmas cards.

A selection of items from the archive have been made available below.

Mineral identification at Amgueddfa Cymru

Amanda Valentine & Jana Horak, 7 December 2009

X-Ray diffraction machine

The X-Ray diffraction machine at the Museum

Passing of an X-ray beam through a rock sample from the source to the detector

Passing of an X-ray beam through a rock sample from the source to the detector

Quartz crystal

Quartz crystal

Graphite

Graphite

Diamond

Diamond

Langite

Langite

wroewolfeite

wroewolfeite

One of the activities of the Geology Department at Amgueddfa Cymru is to document all the minerals known in Wales. Minerals can be identified visually, but for a more definitive confirmation a process known as X-ray diffraction analysis (XRD) is used. This technique allows natural minerals and man-made crystalline materials to be 'fingerprinted' and compared to a database of known samples.

X-ray diffraction analysis

Most minerals are crystalline, which means they are made up of a regular framework of atoms creating a unique 'crystal lattice'.

When X-rays are passed through a mineral, the atoms cause the X-rays to be diffracted, or bent, into many directions. The resulting X-ray pattern can then be recorded to produce a 'fingerprint'. Because no two minerals have exactly the same arrangement of atoms, their 'fingerprints' (or lattices diffraction patterns) are unique. These patterns can therefore be used to identify the mineral.

To analyse a mineral by XRD a small sample, usually ground into a powder, is bombarded with X-rays. The data is recorded as a graph, called a diffractogram, which is a convenient form for viewing the result.

To identify the mineral, the result is compared with a database of patterns from thousands of known minerals.

An X-ray pattern of quartz showing its unique pattern

An X-ray pattern of quartz showing its unique pattern

Identical looking minerals

Visual identification is still important, as it is possible for two different mineral species to have the same chemical composition but look very different. For example, diamond and graphite (both pure carbon) have the same chemical composition, but are clearly different not only in appearance but also in hardness and crystal form.

On the other hand, langite and wroewolfeite are two chemically identical copper minerals that both form blue needles and are consequently difficult to tell apart visually. But because they have different crystal structures and therefore produce different diffraction patterns, XRD provides a quick and reliable method for distinguishing between them.

Some minerals don't have a regular crystal structure and therefore don't produce diffraction patterns. Known as 'Amorphous minerals', they cannot be identified by XRD.

A diffractogram pattern of an amorphous sample with no identifiable peaks

A diffractogram pattern of an amorphous sample with no identifiable peaks

The application of XRD

The technique is widely used in geology and also in a range of related disciplines. For example, it is used to identify minerals in artists' pigments and the composition of corrosion on archaeological artefacts. Conservators can then devise the appropriate treatment for museum specimens.

A great shell collector's work is finally brought together

Harriet Wood and Jennifer Gallichan, 9 November 2009

A specimen plate from the <em>The New Molluscan Names of César-Marie-Felix Ancey </em>

A specimen plate from the The New Molluscan Names of César-Marie-Felix Ancey

Amgueddfa Cymru’s mollusc collections are of international significance, and contain hundreds of thousands of specimens. In 2008 the definitive book on the work of the great collector César-Marie-Felix Ancey (1860–1906) was produced.

César-Marie-Felix Ancey named many land and freshwater species new to science. A portion of his collection came to Amgueddfa Cymru in 1955, as part of the Melvill-Tomlin collection.

Museum staff have been researching Ancey’s collection, held in museums across the world, since 2004 and have now produced the most up-to-date and comprehensive list ever of his new scientific names and publications. It forms a reference tool for specialists and researchers worldwide.

César-Marie-Felix Ancey

César-Marie-Felix Ancey was one of the great Victorian collectors and made a huge contribution to science in his short life.

Born in Marseille, France, on 15 November 1860, he showed a keen interest in natural history from an early age. He created his own collection of shells and later wrote and published many papers on conchology.

Aged 23 he was appointed conservator of the Oberthur entomological collections at Rennes, France. He later returned to Marseille to study law, literature and science, and successfully obtained his diploma in 1885.

Two years later he entered the government in Algeria. After 13 years hard work he was promoted to acting administrator at Mascara in Western Algeria. All his mollusc studies were done in his spare time.

Specimens from across the globe

Ancey’s main interest was in small land snails. Through exchange and purchase he collected specimens from all over the world. The Pacific and Asia are particularly strong in his collection, but it also covers Europe, North and South America and Africa.

It was Ancey’s great desire to make a scientific journey to the Cape Verde Islands or South America, but sadly this dream was never realised as Ancey died of a fever at the young age of 46.

The collection gets split up

After Ancey’s death his entire collection went to Paul Geret, a shell dealer, who sold it on in 1919 and 1923. It was at this point that the collection was split up — the great private collectors of the time, Tomlin, Dautzenberg and Connolly among others, all competed for a part of it.

A majority of Ancey’s specimens are now held at Amgueddfa Cymru (Cardiff: Melvill-Tomlin collection), the Royal Belgian Institute of Natural Sciences (Brussels: Dautzenberg collection), Muséum National d’Histoire Naturelle (Paris), Bernice P. Bishop Museum (Honolulu) and the Natural History Museum (London: Connolly collection).

A tribute to Ancey’s achievements

In 1908 a list of his mollusc publications was produced, shortly followed by a separate list of the scientific names he had published. These two publications indicated that Ancey had described some 550 scientific names in over 140 papers. The problem was that neither of these lists were complete, and this has caused difficulty to researchers in this field of science ever since.

Staff at Amgueddfa Cymru have now located all of Ancey’s papers to form a comprehensive bibliography listing 176 publications and within these we have identified 756 new scientific names.

From trawling the Melvill-Tomlin collection we know that nearly 300 of these names are represented in our collection of Ancey specimens and that we hold type specimens of 155 of these.

The result of this research is The New Molluscan Names of César-Marie-Felix Ancey, the most complete access to Ancey’s work that has ever been available.

Now the true extent of Ancey’s contribution to science and conchology can be revealed, helping to make his collection more accessible to the scientific community worldwide.

The De la Beche archive at Amgueddfa Cymru

Tom Sharpe, 20 April 2009

Sir Henry Thomas De la Beche (1796-1855)

Sir Henry Thomas De la Beche (1796-1855)

De la Beche's sketch of the Geology of Jamaica

The first geological map of Jamaica

Duria Antiquior - A more Ancient Dorset
Duria Antiquior

- A more Ancient Dorset. A watercolour painted in 1830 by Henry De la Beche. This was the first portrayal of a fossil environment in its entirety, showing the interactions of the various elements of the fossil fauna and flora, in particular the large marine reptiles of the early Jurassic Period.

De la Beche and his daughters in Swansea in 1853

De la Beche and his daughters in Swansea, 1853

The Department of Geology at Amgueddfa Cymru houses one of the most important geological archives in the world. It contains over 2,000 items - letters, diaries, journals, sketches and photographs - of one of the leading geologists of the early 19th century, Sir Henry Thomas De la Beche (1796-1855).

During the first half of the 19th century De la Beche played an important role in the new science of geology. In addition to his own scientific contributions, he established geology as a profession and founded several of Britain's major geological institutions, including

  • the British Geological Survey
  • the Museum of Practical Geology (later the Geological Museum and now part of the Natural History Museum in London)
  • the School of Mines (now part of Imperial College London)
  • and the Mining Record Office (now part of the Coal Authority).

De la Beche was born in London and brought up in Devon and in Lyme Regis in Dorset, where he developed an interest in geology through his friendship with a local fossil collector, Mary Anning (1799-1847).

Jamaica

His family wealth came from slavery, and a sugar plantation in Jamaica, and in 1823-4 he spent 12 months on the estate. He toured the island, examining its rock outcrops. On his return to England he published the first description of the geology of Jamaica and its first geological map. De la Beche is regarded as the 'Father of Jamaican geology'.

De la Beche began mapping the rocks of Devon in the early 1830s. However unrest in Jamaica, related to the abolition of slavery and the collapse of the sugar market, left him in financial difficulties and unable to continue his work. He wrote to the Board of Ordnance offering to complete the geological mapping of Devon for the Government for £300. His application was successful and he was appointed Geologist to the Ordnance Trigonometrical Survey.

Founding the British Geological Survey

Once the Devon work was completed, he successfully applied to continue with the geological mapping of Cornwall, and in 1835 the Ordnance Geological Survey was established. From this grew today's British Geological Survey. When most geologists were clerics or interested amateurs of private means, De la Beche was one of the first professionals.

In 1837, De la Beche moved his Geological Survey to Swansea, recognising the economic importance of the Welsh coalfield. He soon became involved in the local scientific scene as a member of the Swansea Philosophical and Literary Institution and a friend of the Swansea naturalist Lewis Weston Dillwyn.

De la Beche was accompanied by his 18-year-old daughter Elizabeth (Bessie). She soon got to know one of Dillwyn's sons,

Lewis Llewelyn Dillwyn , and they married in August 1838. It is from their descendants that the Museum acquired the bulk of the De la Beche archive in the 1930s.

Spectacular fossils discovered

The papers contain a wealth of information about the developing science of geology in the first half of the 19th century. The names of the geological timescale (Cambrian, Ordovician and so on) that we now take so much for granted were being proposed and argued over, new and spectacular fossils were being discovered and evidence of the Ice Age was being recognised for the first time.

De la Beche himself worked on the first descriptions of the large fossil marine reptiles, the ichthyosaurs and the plesiosaurs, and there is much in the papers on the formation of the Geological Survey and the other organizations he established.

Darwin writes to De la Beche

De la Beche corresponded with the leading geologists of the day and, with his experience of Jamaica, was often called on for advice relating to that island. One letter of 1842 in the collection quizzes him about the colours of horses, cattle and other animals bred for a number of generations on the island, and how they had changed. The author was Charles Darwin, at that time formulating his theory of evolution.

De la Beche was a skilled draughtsman and this is evident in the archive, for in addition to faithful landscape views, fossil illustrations and geological cross-sections, he sketched many caricatures and cartoons. Through these he would comment on developments in the science, or on his activities and those of his contemporaries.

The archive is an important resource for the history of geology and is frequently consulted by researchers from Britain and abroad - to arrange a visit, please

contact us .

Editor's note: this article was amended on 28/06/17 to remove a reference to de la Beche being a "fair slave-owner".

The Quilt Collection

17 April 2009

The collection of quilting and patchwork at Amgueddfa Cymru contains examples of bedcovers from the eighteenth to the twentieth centuries, together with smaller items such as cushion covers, linings from christening baskets, eighteenth-century petticoats and a christening gown worn by Peter Morgan of Golden Grove in 1722. The quilt collection at the Museum dates back to the 1930s. Although a few examples of quilts had been donated to the Museum in 1914, no systematic collecting had been undertaken prior to the establishment of the Department of Folk Culture and Industries in 1932.

The collection is available to view by appointment. If you would like further information, please contact the curator using our Email Form.

Scroll down through our collection of quilts which are listed in the following categories: