The following data is extracted from Biographies of One Thousand Representative Men of Massachusetts.
Allen, William, son of William Allen, was born at Brunswick, Cumberland County, Maine, March 31, 1822. He is a grandson of the Rev. Thomas Allen, the “fighting parson” of the noted Berkshire militia, who performed such conspicuous service under General Stark of Revolutionary fame. His father was a clergyman of Pittsfield, a scholar of eminence, and at one time president of Bowdoin College.
After obtaining his preliminary education at the public schools, Mr. Allen fitted for college at Phillips Academy, Andover, and at the North Yarmouth Academy, in Maine, and entered Bowdoin College in 1834. After a few months spent at Bowdoin he went to Amherst, where he graduated in 1842. He began the study of law at the Yale law school, continuing it later at Northampton, where he was admitted to the bar in 1845, and where he has since resided.
In 1880 Mr. Allen was made associate justice of the superior court, which high office he now holds, abundantly justifying the judicious selection of Governor Long, to whom he was indebted for the elevation.
Source: Biographies of One Thousand Representative Men of Massachusetts