Send a message to the person who requested a photo of the grave monument of Frank S Barnwell with the following comment:
I am the Curator of Aerodynamics at the National Air and Space Museum, Smithsonian Institution, in Washington DC. I am writing a book for Cambridge University Press on the history of airplane design. I have a chapter on Frank Barnwell, and in this chapter I would like to include your photo of Barnwell's gravestone.