Just found this question, but the answer is....
Not according to Find A Grave Memorial# 146666097 , URL: https://findagrave.com/cgi-bin/fg.cgi/http%22//%3C/cgi-bin/fg.cgi?page=gr&GRid=146666097
His father is Moses Bethel Barry (1852 - 1924) Find A Grave Memorial# 160498610 , URL: https://findagrave.com/cgi-bin/fg.cgi/http%22//%3C/cgi-bin/fg.cgi?page=gr&GRid=160498610
Moses' father is Robert M. Barry but not Robert Mercer Barry. Dates of birth and death are different. See: Find A Grave Memorial# 84890831 URL: https://findagrave.com/cgi-bin/fg.cgi/http%22//%3C/cgi-bin/fg.cgi?page=gr&GRid=84890831
Hello Anonymous! Did you ever receive a reply to this? If not, you might want to message the profile manager directly with your question. You'd be more likely to get a response in this case. You can do so by sending a private message. The link is just above the Public Bulletin Board on the right hand side of Robert's profile.
No, I adopted the Robert Mercer Barry profile two years ago while researching another group of Barrys' (which were my relatives with the surname Barry who came from Connecticut). Then forgot about it actually.