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.

Minutes of the Calcutta Corresponding Committee with reports on the missions; report of Rev F Abel’s work at the CMS school in 1874;report of Rev A P Neele on his travels in the mission.