This is a good problem.
At full resolution quite a bit of work remains to be done. Glass plate photography is a very delicate medium and almost always needs attention. The technical condition of this one is better than average. Here's a closeup from part of the chair.
Cheers to Xavexgoem; he's working on this now. I had gotten a start on the Washington restoration and then been pulled away by other projects. Had been feeling guilty about not returning to this sooner. Xav was looking for something to do last night and loves the portrait as much as I do. We decided to trade off and share the work.
This is what Wikipedian collaboration is all about. Now does somebody have a talent for tugging at developers' sleeves? It would be a shame if the full version of this restoration existed on only two people's computers.