This collection consists of a detailed calendar of correspondence between clergy in New Brunswick and the Society for the Propagation of the Gospel in Foreign Parts in London, 1821-1848. Most of the letters are written from New Brunswick, with a few replies from London. There is also a calendar of the letters from Archdeacon George Coster of Fredericton, 1829-1844. Both calendars include an index of the names appearing, biographical notes on the writers of the letters, and abstracts of the letters.

There are also 56 reels of microfilm containing other records related to New Brunswick, acquired from the Society, including an index, journals (1747-1860), and calendars (1702-1885)