[2] Henry's mother was of Dutch and Scottish descent, his material grandfather James Frazier Jacquess was a Colonel in the Civil War, which he later fought in.

[5][6] In the 1860 United States Census he listed his occupation as "student" and a year later he enlisted in the Union Army.

[7] When the Civil War broke out, Castle enlisted in the Union Army around 1861 and was put into the 73rd Illinois Infantry Regiment.

[8] He gained the rank of Sergeant Major and was discharged after being injured during the Battle of Stone River on April 19, 1863.

In 1885 the Wisconsin Central Railroad built a track going through the area and in 1887 North St. Paul was incorporated into a town.