J. Gray to Derby: arrival of H.M.S. Fly; J. MacGillivray, 1846-06-24 Unit ID: 1/69/86 Date: 1846-06-24
J. Gray to Derby: bird collecting on New Guinea expedition of Capt. O. Stanley, 1846-05-01 Unit ID: 1/69/83 Date: 1846-05-01
J. Gray to Derby: interest in natural history of J. Brooke of Sarawak, 1845-01-13 Unit ID: 1/69/42 Date: 1845-01-13
J. Gray to Derby: refers to collection of J. MacGillivray, 1845-05-23 Unit ID: 1/69/52 Date: 1845-05-23