Plan Of The Islands [Peros Banhos] Discovered By Lazare Picault In The Tartan Elizabeth, 1744. [Scale of] Nautic Miles [approximately 1:360,000]. A. Dalrymple, 5 August 1784.
Plan Of The Islands Called Peros Banhos. Lieut. Archibald Blair, 1786. [Scale of] Nautic Miles [approximately 1:360,000]. Plan Of The Eleven Islands And Governor Boddam's Harbour. Lieut. Archibald Blair, 1786. [Scale of] Nautic Miles [approximately 1:91,000]. A. Dalrymple, 16 January 1788.
Plan Of The Calcutta's Track Near The Chagos. From a MS. received from Capt. William Thomson. [Scale of latitude approximately 1:730,000.] Plan Of The Callcutta's Track Over The Basses De Chagos. Will. Nicholls. [Scale of latitude approximately 1:730,000.] A. Dalrymple, 22 October 1784.
Plan Of Part Of The Island Chagos Or Diego Garcia. From a Survey made in the Drake Ketch 1774. [Scale of latitude approximately 1:91,000.] A. Dalrymple, 12 July 1784.
Chart Of The Eagle's Track [Chagos Archipelago] 1772. Joseph Mascall Voluntr. 1774. From a MS at the East India House. [Scale of latitude approximately 1:730,000.] A. Dalrymple, 17 September 1784.