The fonds consists of correspondence and documents of Angus MacAulay. A certification dated 1783 documents his performance at Marischal College in Aberdeen. Correspondence between MacAulay and Alexander MacDonald (1789-1791) deals with MacAulay's appointment as factor and commissioner to MacDonald and business matters thereafter. Correspondence with Lord Selkirk (1794-1803) relays information about MacAulay's lot of land in Belfast. Other correspondence consists of requests made by MacAulay to the war office regarding payments and an allowance for his family (1795-1827).