Denis Mackail (1892 - 1971) was an English novelist and short-story writer, publishing between the two world-wars.He was born in Kensington, London on 3 June 1892, and went to Balliol College, Oxford, but failed to complete his degree through ill-health after two years.His first work was as a set designer, notably for productions by J. M. Barrie's and George Bernard Shaw. The outbreak of World War I interrupted this promising start, however, and Denis, not fit enough for active service, worked in the War Office and the Board of Trade.In 1917 he married Diana Granet, only child of the railway m...