Isaac Newton Baker (March 12, 1838 – March 23, 1923) was an American writer and editor who was private secretary to, and biographer of, Robert G. Ingersoll. He was an editor of the American Sunday-School Times. He was born in Philadelphia, where he died in 1923 of arteriosclerotic heart disease. References External links 1838 births 1923 deaths Writers from Philadelphia 19th-century American writers Deaths from arteriosclerosis