John Seely Hart (1810–1877) served as both principal and professor of "Moral, Mental and Political Science" at Central High School in Philadelphia, Pennsylvania, from 1842–1858. He is widely credited with turning the school from a mediocre institution to an exemplary one. Hart was a prolific author, writing many books on literature and the proper use of grammar.
Henry McMurtrie (1793–1865) was an educator and professor of of anatomy and physiology at Central High School in Philadelphia, Pennsylvania.
Isaac F. R. Mulock was associated with (possibly a student at) Central High School in Philadelphia, Pennsylvania, and attended a series of lectures by John S. Hart and Henry McMurtrie from 1845–1847.
Barnard, Henry. The American Journal of Education, Volume V. London: Trubner & Co., 1858. Additional information derived from the collection.
From the guide to the Isaac F. R. Mulock lecture notes, 1845–1847, 1845–1851, (University of Delaware Library - Special Collections)