William Henry Cavendish Bentinck, Duke of Portland, & Lord Edward Bentinck [graphic]Smith, John Raphael, 1752-1812, printmaker[24 June 1780]eng"Double portrait after West (Staley 683); whole-length, the Duke at left, leaning on a pedestal and wearing his robes, his coronet just visible behind his right arm, Edward standing beside, his right hand on his brother's shoulder and left on his hip; curtain behind at left; state published by Humphrey. 1774 as re-issued in 1780."--British Museum online catalogueTitle engraved within bottom portion of image.State from: Russell, C.E. English Mezzotint portraits and their states.Window mounted to 51 x 36 cm.Mounted opposite page 578 (leaf numbered '7' in pencil) in volume 4 of an extra-illustrated copy of: Moore, T. Memoirs of the life of the Right Honourable Richard Brinsley Sheridan.