John E. Nail (August 22, 1883 – March 6, 1947) was an African-American real estate agent in New York City, significant for developing Harlem.
Hutchens C. Bishop of St. Philip's Episcopal Church, bought over a million dollars' worth of real estate in the Harlem area of New York City.
Starting in the late 19th century, African Americans began moving from the Southern United States into the New York City area.
His work left Harlem a community of renters, rather than owners, and led ultimately to the area being populated by working-class tenements.
[1] John Nail served on the planning committee for the NAACP's historic 1917 Negro Silent Protest Parade.