London
9 September 1862
Sir /
referring to Mr Le Neef Foster, Secretary of the society of arts, who has kindly allowed me to do so, I have leave to address to You this lines [sic].
Being commissionar [sic] of the Hanoverian Government at the international Exhibition, and being at the same time charged by the Zollverein, to make a rapport on Class XIV, comprehending Photographic, I have seen with great interest Your photographical engravings on steel, and I should be glad, to give a somewhat detailed account of the process, by which You have gained this results. – I have read a description of Your process in the Journal of the Society of arts, October 29, 1858, but as it is possible, even likely, that in the space of four years You will perhaps have introduced some amendments in the process, I would beg You Sir, for some information, if the process, in which You have made the engravings exhibited, is still the same as given in that description.
At the same time I should be very much oblidged [sic] to You, Sir, if You would do me the favour, to send me one or the other small sample of Your engravings.
I am Sir Your most obediant[sic]
Fr. Heeren.
Doctor
Professor at the polytechnical Institution in Hannover.
9 Victoria Grove, Kensington.
Mr W. H. Fox Talbot Esq –
[envelope:]
Mr. W. H. Fox Talbot Esq.
Lacock Abbey
Wiltshire
Millburn Tower Gogar
Edinburgh