I question this wife, as I've seen no documentation of his marriage to this lady.
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I only know about Anna Symmes and Susannah Symmes
He had a daughter named Mary (all three of his children were by his first wife, Anna King). Mary (born August 30, 1767) isn't represented on Geni, very little is known about her apart from her birthdate, and may have died young.
The alleged wife, "Mary Henry" was born ca.1792-1804 -- that seems awfully young to me (20-30 years younger than his own daughters). Plus, where is the evidence of this marriage?
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I disconnected this duplicate of his second wife, Susannah Livingston, because it was assigned as mother to First Lady Harrison (daughter of his first wife, Anna King). I also changed this one's maiden name to match her actual parentage (was originally "Ridley", which is her sister's married name). I'm done trying to straighten this out, and would appreciate some help with it, please. Thank You.