Studio photograph of four men writing, smoking opium and posing with abacus around the table, Hong Kong

Buddhist nuns writing at desks

Man with an abacus writing in an account book in a lantern-making shop

Man calculating with an abacus in a lantern-making shop

Grain merchant at a desk calculating with an abacus and writing in an acount book

Kitchen of Niu Rou Wan, a Muslim grilled-beef restaurant, showing a worker using an abacus

Two photographs: A curious crowd looking through a window at foreigners (some children frightened by the camera)

A studio tableau of accountants or businessmen