[printed notepaper with date inserted in manuscript:]
South Kensington Museum, London, S.W.
17th day of April 1876.
In your reply, please quote this number.
Scientific Apparatus Exhibition.
I beg to thank you for your kind offer, communicated by Captain Abney, R.E., <1> to contribute to the above-named Exhibition, specimens of your Photoglyphic Engraving, and I have to request that you will be so good as to furnish, at your earliest convenience, on the enclosed form, descriptions of the specimens, for insertion in the catalogue.
I am, Sir, Your obedient servant,
P. Cunliffe Owen
H. Fox Talbot Esq. F.R.S.
1. Sir William De Wiveleslie Abney (1843–1920), Captain, chemist & educator.