Correspondence on the Mackie Ethnological Expedition, for consideration of Council of the Royal Society Letters and papers relating to the anthropological expedition to Uganda in 1919, led by Reverend John Roscoe and funded by Peter Jeffrey Mackie. Mostly dealing with the arrangements for Roscoe's supplies and equipment, his sailing, and the difficulties of his initial arrival. These letters are a chronological continuation of the correspondence in CD/50. 1919