You have a very distinguished family.I have been researching one of your ancestors--J. Wm. Fosdick--for over ten years, especially since 2006 when Google Books and the NY Times started publishing old books and archives, respectively.Since that time, my research on J. W. F. has been intensive, and since he was not only a famous artist in fire etching (the focus of my research), he was also a prolific writer, this has been a gold mine for a researcher.
I have a very large section on him now in my E-Museum of Pyrographic Art (starting at the SECOND IMAGE on the following web page: http://pyromuse.org/antique.html)http://pyromuse.org/antique.html).
I had posted previously to M. M. Steele's query back in 2008, but I wanted to note that, since Oct. 2009, the E-Museum has now moved to pyromuse.org.
I am ever hopeful that some of his descendants will have works by him and will be in touch with me so that I can display images of those works in the E-Museum.Most of the images I have to date are from articles by and about him dating back about a hundred years.
There were ten panels by him in the Men's Grill at St. Botolph's Club in Boston, but I don't know where they went.I hope one of you may have the answer to that query.
His Salon No. 3 exhibit in the E-Museum has much biographical data on him and his wife,