Tad Lincoln's music teacher, William Withers jr?

[Eva Elisabeth]

Just a thought. We once discussed this:
   
...here:
http://rogerjnorton.com/LincolnDiscussio...light=drum
Though in the original photo it is, of course, Tad who is looking at the book (photo album) in A. L.'s hands, due to the size of the children - could the artist have intended the boy on the right with the drumsticks to be Tad?
Due to this link Roger provided:
http://memory.loc.gov/cgi-bin/query/h?am...sm000412))
...the picture was published in 1865, thus before Withers' 1892 interview. Of course Withers might have bragged about his drum lessons already at the time he allegedly taught and have been the artist's inspiration (but is it likely he would have lied in those days?), or the artist completely imagined Tad (if it's Tad) playing the drums - but could it be he heard such elsewhere?
In any case, if one instrument matched Tad, it was the drums IMO.