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.

Letter from the Bishop of Calcutta to the Archbishop of Canterbury, Calcutta 1879; minutes of the Calcutta Corresponding Committee with an update on the missions; report by Rev J Erhardt to Rev W Gray on his arrival at the Sikandra Orphanage, April 1879 describing the huge influx of sick and starving children; another report by Rev J Erhardt describing the desperate state of starvation in the area; the secretary of the mission’s report on Anglo-Vernacular Schools; details on the CMS institutions in the area– staff, educational agencies and CMS buildings. At the end of the volume are Annual Letters from missionaries for 1878-1879.