Email from the 5th Earl of Cranbrook to Frederick H. Sheldon, Geoffrey Davison and Robert Moyle concerning various species of swiftlets found in Sabah and Sumatra

Email from the 5th Earl of Cranbrook to Godwin Limberg concerning his activities when visiting Indonesia

Email from the 5th Earl of Cranbrook to Goh Wei Lim concerning house farming

Email from the 5th Earl of Cranbrook to Gottfried von Gemmingen telling him that he would be visiting Samarinda and would like Gottfried to help him get contacts of bird-nest cave owners and managers in KalTim

Email from the 5th Earl of Cranbrook to James P. Dean, Collections Manager, Division of Birds, National Museum of Natural History, Smithsonian Institution inquring about skins of the Aerodramus germani-fuciphagus group from various Asian countries

Email from the 5th Earl of Cranbrook to Jean-François Voisin concerning his paper on Vietnamese house swiftlets. The Earl rejected amechanus as name for West coast Malaysia islands swiftlets

Email from the 5th Earl of Cranbrook to Keith Chin saying that the government permitted 'rights' to collect nests in caves, but did not recognise ownership of the cave or the rock with which the cave was surrounged. The rock could be leased for quarrying

Email from the 5th Earl of Cranbrook to Lim Chan Koon asking what the weight of a white-nest swiftlet egg was

Email from the 5th Earl of Cranbrook to Lim Chan Koon concerning Lim's paper on swiftlet breeding. The email also concerned the Earl's travel plans

Email from the 5th Earl of Cranbrook to Lim Chan Koon enquiring about the table of Borneo cave sites with Sarawak data, including yields