Hussey, William Penn
William Penn Hussey was well-known as builder/owner of the Riverbank mansion in Danversport built c1883.
He is the figure sitting on horseback in the statue across the road from the mansion, used as the New England Home for the Deaf.
For more information about Mr. Hussey, see this wiki, Riverbank entry.
Vertical File in Salem Collection - Hussey, William Penn