A marine painter and watercolourist, as well as an etcher, illustrator and poster designer, who was born at Seaton Carew in County Durham. 

 Mason was educated at HMS Conway and followed the sea for a time,  later becoming engaged in engineering and shipbuilding at Leeds and Hartlepool.  Although he lived in Yorkshire, he travelled abroad extensively, painting many marine and coastal subjects, often in watercolour.  During the First World War he served as a Lieutenant in the RNVR in the North Sea and Egypt. Later he designed posters for the railways, advertising Yorkshire, and he lived for some years in Scarborough. 

 He exhibited at the Royal Academy from 1900 as well as at the Royal Institute of Painters in Watercolours where he was elected a member in 1929.  A retrospective exhibition of his work was held at the National Maritime Museum in 1975.

 His work is very popular with collectors and is represented in a number of public collections.