George Sullivan Baker (1812-1867) was born in Bow, New Hampshire, and died in Sanbornton, New Hampshire. He was the youngest of Mary Baker Eddy's three brothers and a close friend of Eddy's first husband, George W. Glover. In the early 1830s, he went into partnership with his brother-in-law, Alexander H. Tilton, and built a textile mill in Tilton, New Hampshire. Later, from 1835 to 1838, he worked in various roles at Wethersfield State Prison in Connecticut. Then, in June 1844, he was appointed as a colonel, an aide-de-camp, on the staff of John H. Steele, Governor of New Hampshire. Baker held this position for two years until June 1846. In 1849, he married Martha Drew Rand in Northfield, New Hampshire. Soon after they moved to Baltimore, Maryland, where Baker was appointed superintendent of carding and spinning in the Maryland State Penitentiary. Baker returned to New Hampshire in 1855, living first in Northfield and then Tilton, where he continued to work in textile manufacturing.

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