John Mulholland (1898-1970) was born in Chicago, but moved to New York City when young with his mother.
He started performing as a teenager and went on to become authority on magic.
In the 1930s, he took over The Sphinx, the largest magic magazine of it's time. Mulholland had one of the largest collection of magic memorabilia and apparatus.
He invented the Mulholland Box (a type of okito coin box).