Chart From Negrais To The Island Carnicobar. John Ritchie, 1771. [Scale of latitude approximately 1:1,500,000.] Inset views. A. Dalrymple, 4 November 1784.
Chart Of The Andaman Islands. John Ritchie, 1771. From the MS. at the East India House. [Scale of latitude approximately 1:730,000.] A. Dalrymple, 13 January 1785.
Sketch Of The West Coast Of Andaman. Capt. James Gray Wragg in the Ship Dolphin, 1771. [Scale of] Nautic Miles [approximately 1:1,500,000.] Inset: View Of The Great Andaman. With the Soundings in the Lord Mansfield, by Capt. Alexr. McCleod, 1764. [No scale given.] A. Dalrymple, 18 December 1784.
Track Of The Stretham [Andaman Islands]. Capt: H. Gough, December 1708. From the Journal at the E. India House. [Scale of latitude approximately 1:1,500,000.] A. Dalrymple, 11 December 1784.
Chart Of The Channel Thro' The Andamans. Passed by Capt. Cleugh in Ship Adm. Pocock, December 1764. [Scale of latitude approximately 1:730,000.] Inset: Track Of Snow Mercury Thro' The Andamans. 27th. April 1775. Capt. John Ashbridge. [Scale of latitude approximately 1:730,000.] Inset: Chart Of The Channel Between Great And Little Andaman Islands, Thro' Which The Ganges, Capt. Peter Duncan, Passed In The Voyage To, And Return From, Manila. George Boswald. [Scale of latitude approximat...