Samuel Sloane was apprenticed as a carpenter in Philadelphia and worked under the direction of the English architect John Haviland on the Eastern State Penitentiary. In the 1830s and 1840s he worked his way upwards as carpenter, foreman and supervisor on the planning and building of mental hospitals and prisons. While working on a hospital for the insane, he met the reformer Dr Thomas Kirkbride; together they developed a system for housing the insane that later led to a string of architectural commissions. In the later 1840s he won a commission as a designer of a new courthouse and jail for Delaware County, PA. He was commissioned by Andrew M. Eastwick and Joseph Harrison to build their mansions in Philadelphia.
Kennedy, Roger G., Architecture, Men, Women and Money in America, 1600-1860, New York, 1985, pp. 379-88.