1. 1787.d.7, 4(37) Reference (shelfmark): 1787.d.7, 4(37) Title: Native professor of mathematics, and pupils. Photographer: Thomson, John Scope & Content: Genre: Portrait Photography Group portrait of Le-shen-lan, professor of mathematics in the Imperial College, Peking, and students, posed in a courtyard. Collection Area: Printed Collections Languages: Not applicable Date Range: c 1872 Extent: 1 item