Hi Platz!!! This portrait was on a dog enciclopedia, who mentioned that this dog was an Irish wolfhound, for me, makes sense because the last name of this man was irish, and many old refferences about the irish wolfhound tell that they were huge grayhounds, and this dog looks like those mentioned before, and this portrait was done in the irish wolfhound golden era. Also, I think this man was irish. After looking the name of the man, and brousing in the net, i found this picture in the Tate gallery of UK, further historical information must be there Regards