John Williams Campbell was born in Brooklyn in 1880 into a well-to-do family. His father was treasurer of the Credit Clearing House, a credit bureau for merchandise wholesalers. At the age of 18, Campbell joined his father at the firm and moved up the ranks, becoming a senior executive seven years later. By the 1920s Campbell was making millions as president of the Credit Clearing House and served on the board of the New York Central Railroad.
This story is adapted from a Museum of the City of New York blog, which can be viewed here.