N S Maskelyne Esq
[blind stamp: The Athenæum Club]1
Nov. 30
Dr Sir
We have sufficient evidence of the correctness of the 2d part of the specificatn 2 in which the invisible image is made to come out positively; and therefore this part need not be experimented on, 3 but perhaps you will like to see some specimens of it. I propose next summer to make a series of Camera Views of this little known branch of the art. The principle is sufficly shown by the enclosed, 4 which is the shadow of a slip of card.
Yours truly
H. F. Talbot
Please cite as “TALBOT7073,” in Ɛpsilon: accessed on