I asked a friend who is familiar with wood engraving about
where the Harper’s blocks might be. This is what she had to say:
Wood engravings were (and are) made from wooden
blocks (generally pieces of boxwood bolted together for the old Harper blocks),
although they were often printed from electrotype plates. The Portrait Gallery
has a single Harper's block from the Civil War, although it does not show
Abraham Lincoln. I know the Boston Public Library has lots of wood engraving
blocks, but I don't know if any are Harper's, or Civil War era, or Abraham
Lincoln. I wouldn't be surprised if the American Antiquarian Society in
Elizabeth Tobey, Director of Communications & Research
National Sporting Library
540-687-6542 x 11
http://www.nsl.org/