The Mission Books contain hand written copies of the Original Papers sent by the missionaries to the Secretary in London. The papers are numbered in the order they arrived in London. The letters and journals from 1844–May 1849 are copied out in full and a note of receipt is made for the financial and printed papers. From 1849 onwards the letters only are copied. Annual Letters are not copied out but those from 1875 onwards are printed at the back of the volumes. Each volume contains a name index.

Items include: letters from Rev William Smith to Rev James Innes re his missionary tour through Oude in 1843 with a description of Lucknow and breakfast with the King; Rev J Innes to the Lay Secretary re finances; Rev C G Pfander’s journal, Jan-March 1843; minutes of the Calcutta Corresponding Committee detailing progress in the missions; Rev J P Menge’s journal for Jan-Sept 1843 describing his tour from Gorakhpur to Jaunpoor; Rev J Hoernle’s report on the Orphan Institution at Agra; circulars; details of missionary travel expenses.