Bronze Age Gold from Wales

Six documents relating to C. Isler & Co. (artesian & consulting well engineers) including: An advertising leaflet for C. Isler combined hand and power driven rotary and percussion drill; black print on white paper. Advertising leaflet for patho-oil engine driven percussion rope drill; black print on white paper. Advertising leaflet for Artesian bored tube wells; black print on white paper. Single page containing a b&w printed photograph of a piece of machinery, labelled "Messrs Tate & Lyle Liverpool". Also two letters from C. Isler & Co. Ltd. to l. Heath regarding photos of boring machinery. Dated 7th & 13th January 1960. Typed in black ink on company headed paper.