Thomas Godsell, on board the Duff (typescript), 21 July 1796-31 July 1798 Unit ID: 1A (Box 1) Date: 1796-07-21/1798-07-31
Thomas Haweis, on board the Duff, Blackwall to Portsmouth, 10 August 1796-01 October 1796 Unit ID: 1 (Box 1) Date: 1796-08-10/1796-10-01
Thomas Heath, visit to Austral, Pitcairn and Marquesas Islands, 10 August 1840-03 December 1840 Unit ID: 129 (Box 9) Date: 1840-08-10/1840-12-03
Thomas Heath, voyage to Rotumah, New Hebrides and New Caledonia, 23 April 1840-21 May 1840 Unit ID: 126 (Box 9) Date: 1840-04-23/1840-05-21
Thomas Powell, deputation to Tokelau, Ellice and Gilbert Islands, 25 October 1871-06 February 1872 Unit ID: 161 (Box 11) Date: 1871-10-25/1872-02-06
Thomas Powell, Upolu, Samoa, 02 October 1879-18 November 1879 Unit ID: 175 (Box 11) Date: 1879-10-02/1879-11-18
Thomas Powell, visit to Manu'a Islands, Samoa, 15 August 1870-May 1871 Unit ID: 158 (Box 10) Date: 1870-08-15/1871-05
Thomas Powell, voyage to Tokelau, Ellice and Gilbert Islands, 19 September 1871-31 December 1871 Unit ID: 160 (Box 11) Date: 1871-09-19/1871-12-31