I have found a description of the bible (it seems to be the one with the date 1865?):
http://bibles.wikidot.com/douayrheims-americaIt seems to be signed by the Archbishop of New York, John Hughes (John, "the dagger" Hughes)although it doesn't match one that I found online
http://secondat.blogspot.com/2010_06_01_archive.htmland because he died in 1864. Maybe he approved of it before he died. It looks like a very valuable bible. What a wonderful find!
Alison