You remind me of this discussion: http://rogerjnorton.com/LincolnDiscussio...t#pid23171
...and the tie may also be a scarf like JWB's in that photo. But it's sure not JWB, he was slimmer. Hmmmm. Looks like someone who took great interest in a neat appearance. Robert (TL)? Another wild guess (if allowed) - John Hay in later life?