Two years after his father’s death, Isaac was established in Frederick County, Maryland, continuing in the family gunsmithing trade. In 1756, he received muskets, gunpowder, and bar lead for bullets for use of the Baltimore militia.1459

In 1758, Joshua Baker of Winchester in Frederick County, Virginia, gunsmith, conveyed for 5 shillings to Isaac Baker of Frederick County, Maryland, also gunsmith, 391 acres of land.1460 Other, similar transactions between the brothers are recorded.

Isaac Baker moved to Washington County, Virginia around 1790 and died there.

His life and family are very well described by Roberta Tuller online.1457