Letters from Calvert (Lakemba, Viwa, Sydney) to other missionaries, including John Hunt, Richard Lyth (Viwa), Thomas Williams (Somosomo), David Hazlewood (Somosomo), Thomas Jaggar (Viwa), and William B. Boyce (21 letters), 1841-1855 Date: 1841/1855
Letters from Calvert (Viwa, Ovalau, Melbourne, Bristol, Dublin) to his wife and children (13 letters), 1848-1861 Date: 1848/1861
Letters from James and Mary Calvert (Sydney, Lakemba, Viwa) to her brother Philip Fowler (London) and his family (28 letters), 1837-1850 Date: 1837/1850
Letters from James Calvert (Sydney, Bau, Ovalau, Melbourne, Adelaide) to Rev. George S. Rowe (Blackheath) (56 letters and 4 fragments), 1861-1866 Date: 1861/1866
Letters from James Calvert to various people, including letters to Rev. Shirley Baker (Tonga), 21 Aug. 1864, 26 Aug. 1886., 1856-1892 Date: 1856/1892
Letters from Mary Fowler (Aston Clinton) to James Calvert (Hoxton) (2 letters), October 1837-January 1838 Date: 1837-10/1838-01
Letters from ministers and ministers in New South Wales, South Australia and Western Australia to the secretaries of the Wesleyan Methodist Missionary Society in London, 1843-1850 Date: 1843/1850
Letters from ministers in all the Australian colonies except Tasmania to the secretaries of the Wesleyan Methodist Missionary Society in London, 1862-1868 Date: 1862/1868
Letters from ministers in all the Australian colonies except Tasmania to the secretaries of the Wesleyan Methodist Missionary Society in London, 1868-1871 Date: 1868/1871