Good morning from Congers, NY.  I purchased this watercolor from a local estate a few weeks ago.  I did a little research, but came up empty.  I think this is a case where your scholarship pays off, so do give this a second look.  Thank you for looking in and happy eBaying!
Estate fresh small watercolor portrait dated "March 1832" (possibly '52, but I think the initial dot of watercolor contact makes it a 3).  The size of the visible paper is appx. 6.5" x 5".  Framed size is 7 1/8" x 5.5".  
Handsome bearded gent sits in a chair, facing left.  He wears a blue jacket and has a very high neck black collar.  I think the image is very well executed.  I have not opened the frame to see if it is signed on the back.  Unknown artist (but I wager one of YOU has a guess or three).  I think North American, but if someone says European I won't argue too hard.
A few minor flecks off of frame.  Nothing horrible.  Need additional photos? Let me know specifically what you want to see and I'll make it happen. 
Offered for sale at $349.76.  I have a little room, please feel free to make an offer.  I will ship this item in a carefully packaged Priority Mail box, and I pay all associated insurance charges.  If you have any other questions, feel free to send them over.
The item will be carefully packaged and shipped via Priority Mail.  I will pay for insurance for full value of the item; I will also pay for any additional domestic shipping charges not indicated here or shipping overages.  You may/will need to sign for the item when it arrives.