Plan Of The Harbour Of Praslin. Lieutenants David Thomas & William Robinson, July 1771. Scale of Nautic Miles 60 = 1°. [approximately 1:91,000]. A. Dalrymple, 20 November 1779.
M. D'Apres' Chart Of The Islands And Dangers Situated To The N E Of Madagascar. [Scale of latitude approximately 1:1,500,000.] A. Dalrymple, 11 August 1784.
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.