| Unidentified photographer/creator "The Tramps on Singla La" from "A Tour in Sikhim, being a journal of five Calcutta tramps on their tour in Sikhim, Easter 1912" (Calcutta: [printed by the Art Press] for private circulation only, 1912) 1912 Title page Donald A. Heald - Rare Books, Prints & Maps Donald A. Heald - Rare Books, Prints & Maps, New York (#21941) LL/41233
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