Oil on Canvas. Mason Chamberlain R.A. 1727-1787 - A gentleman seated in his study with his son or grandson, a greyhound at his feet and holding a trundling hoop.   Mason Chamberlain R.A. (1727-1787) began his career in a counting house in the City of London but turned to art and studied under Hayman, in whose manner he painted conversation pieces. He was a founder member of the Royal Academy, exhibiting 50 works there between 1760 and 1786. He painted the portrait of Benjamin Franklin in 1762 and their Royal Highnesses Prince Edward and Princess Augusta in 1771. His works are represented at the Philadelphia Museum of Art, The National Portrait Gallery, London, Yale NMM and the Milwaukee Museum. Provenance: Christies July 11 1984 With Thomas Agnew and Sons, London Philip Reiff, the sociologist 1984 With Mallet, London (See Label Verso) Width: 40" / 102 cms Height: 48" / 122 cms