Dictionary of National Biography, 1885-1900/Bockman, R.
BOCKMAN, R. (fl. 1750), portrait painter and mezzotint engraver, the initial of whose Christian name is given by Füssli as C. or G., was known as an artist in Amsterdam, whence he appears to have come first to England. He worked in this country in the early part of the eighteenth century. He painted several portraits of the Duke of Cumberland, and a life-size half-length of Admiral Russell, which is in the hospital at Greenwich. He copied after Kneller, and engraved portraits in mezzotint after Vandyck, Vanloo, Dahl, Worsdale, and others. He painted and engraved (1743) a picture of 'St. Dunstan holding the Devil by the nose with the tongs.' His widow applied for relief to the Society of Artists in 1769. Heinecken mentions amongst his portraits those of 'Thomas Chubb the Deist,' of 'Thomas Holles, duke of Newcastle,' of 'Charles, Lord Talbot,' and of 'William Walker.'
[Heinecken's Dictionnaire des Artistes, 1789; Füssli's Allgemeines Künstler-Lexikon, 1806; Redgrave's Dict, of Artists, 1878.]