his portraits may be mentioned ... two portraits of Sir Walter Scott -
one after Raeburn and the other after Lawrence; and a portrait of Burns
after P Taylor - the portrait representing the poet in a broad-rimmed
hat, about the genuineness of which there was much discussion, though
its authenticity is now fully established.
also engraved a picture of Prince Charles reading a despatch, after
William Simson, for the Royal Association; Italian Shepherds, after
McInnes, for the Glasgow Art Union, etc.
landscape, some of the finest plates in the quarto volume of Turner's
works were by Horsburgh, also some of the vignettes after Turner for the
illustrated edition of Sir Walter Scott's poetical works.
For the last fifteen or twenty years, he may be said to have retired
from professional labour."
The Scotsman - 1869]