Justin E. Jackman was born in 1860 in Newburyport, Massachusetts, to George and Lydia Jackson. He had a brother, Joseph Jackman, who was 19 years his senior. Both Mr. Jackman's father and older brother worked as ship carpenters.
He was incarcerated in the Massachusetts State Prison for 14 months. Mr. Jackman died of double pneumonia on August 21, 1880, at 20.
