John Falconer, British Library
A Biographical Dictionary of 19th Century Photographers in South and South-East Asia
‘Some very excellent calotypes were also exhibitd by Lieut. Hill of Dum-Dum. These views were clear and distinct, and almost equal to collodion pictures. Lieut. Hill observed that his process was simple, and that he purposed publishing a paper on the subject for the first number of the Society’s Journal.’
- Λ Journal of the Bengal Photographic Society, vol 1, no. 1, 1 May 1862, p. 6.