Born in
Clitheroe, Lancashire, England, U.K., fifth child of Alice Lofthouse and Benjamin Dean, he moved with his family to America at the age of five, and grew up in
Lowell, Massachusetts. He attended Lowell schools and
Dartmouth College. In 1845 he was admitted to the bar, and founded the Lowell firm of Dean & Dinsmoor, Attorneys. Dean continued his practice after moving to
Boston in 1852. ==Public service==