Lower Mall
Hammersmith 1
Novr 2 /58
My dear Sir
Mr Crookes 2 has informed me that you have had some difficulty in finding large glass photographs to convert into engravings. 3 I have four pairs of positive stereoscopic pictures on glass plates, about 12 by 8 inches; they were taken for me by Ferrier 4 of Paris. All the subjects are architectural. The bird’s eye view of Paris along the Seine 5 would, I think be a good subject for you. They are quite at your service, and if you can make use of them I will desire Messrs Murray & Heath 6 to deliver them to your order, or forward them to you. A pair of stereographs would be perhaps a better test of the accuracy of your process than a single picture would be; 7 M. Pretsch 8 engraved a pair for me from paper positives, but there was too much touching up in them.
Yours very truly
C. Wheatstone
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