 He is known for his account of Constantinople and the Greek islands, published in 1797; and his county history of the western parts of Sussex, of which he published two volumes in 1815–19.Dallaway was born at Bristol on 20 February 1763, the only son of James Dallaway (1730–87)), banker of Stroud, Gloucestershire, and his wife Martha (1739–83), younger daughter of Richard Hopton of Worcester.He was educated at Cirencester Grammar School, and then at Trinity College, Oxford, from where he graduated BA in 1782, and MA in 1784.