Dawe after Raeburn (?) Lord Alexander Abercromby {by 1865} Loc? [PR]

Dawe, George (1781-1829; English), after (?) Raeburn, Henry (1756-1823; Scottish)
Lord Alexander Abercromby (1800)
Mezzotint
Acquired by 1865
Present location unknown

Abercromby (1745-95) was a Scottish lawyer and essayist.

NGV 1905 indicates Raeburn as the source. However, another impression, in the National Portrait Gallery, London (reproduced below), is listed as after an unknown artist.

[photo reproduced below: National Portrait Gallery impression]

Refs.

NGV 1865, p.82 (artist/s not named); AR 1870-71, p.34: Engravings (framed); NGV 1894, p.107 (V.Buvelot Gallery, 2^nd bay, no.23: as by Dawe); NGV 1905, p.119 (V.Buvelot Gallery, 2^nd bay, no.13: as after Raeburn) 

For the impression shown here (NPG D7130, purchased 1966), see http://www.npg.org.uk/collections/search/portraitLarge/mw41140/Alexander-Abercromby-Lord-Abercromby?LinkID=mp50181&role=sit&rNo=0