Genealogy Day

Genealogy Day - Well not quite a day, more of an afternoon really.  The photo on the screen is of my great grandparents Robert Benyon (1842-1906) and Mary Fennah (1846-1945) with three of their children.  The photo was a small tintype which has been restored and enlarged with photoshop.  I am trying to figure out which of their 14 children this is?  Any help dating this photo would be appreciated - possibly 1890's.