These quick figures sketches by Piranesi--probably just studies of someone in his workshop--would seem to date to the mid-1760s. For a similar study, see the "Half-Length of a Bearded Man" at the Hamburger Kunsthalle, inv. 2000-1. The drawing is on the verso of a fragment from a page of accounts in pen and brown ink.
Numbered at right, in graphite, "10".
Morgan, Jane Norton, 1868-1925, former owner.
Morgan, Junius Spencer, 1892-1960, former owner.
Morgan, Henry S. (Henry Sturgis), 1900-1982, former owner.
Stampfle, Felice. Giovanni Battista Piranesi, Drawings in the Pierpont Morgan Library. New York : Dover, 1978, no. 122, repr.