John Falconer, British Library
A Biographical Dictionary of 19th Century Photographers in South and South-East Asia
‘One of the largest contributors to the [Madras Photographic Society] Exhibition [of December 1860] was C. Iyahsawmy, Photographer in the School of Arts and lately assistant to Captain Tripe, while Government Photographer. The best of his contributions were two views of the Scotch Church, one of a Pagoda at Vepery, and three of the diving and dredging apparatus on the island. These were taken by the waxed paper process...During the exhibition Iyahsawmy was kindly taught by Dr A.J. Scott, to take likenesses, to print and to tone portraits by the collodion process and he has been enabled to teach others who have applied for instruction at the School of Arts.’
- Λ Madras Journal of Literature and Science, No.11, new series, May 1861, p.196.