Robert Frederick Foster
Foster left employment at one of the largest manufacturing houses in Baltimore to become the business manager for "Professor Alphonse Loisette" (later identified as Marcus Dwight Larrowe), a lecturer and promoter of systems and methods to develop and improve a memory skills. Foster resigned in April 1888, wishing not to be associated with Loisette's unethical personal and business practices and accusing him of being a "humbug and a fraud". Foster subsequently joined William Joseph Ennever and others in a similar business venture, the Pelman School of Memory Training, a correspondence school based in Chicago and London. He delivered lectures and wrote training materials, most notably The Secret of Certainty in Recollection, plainly stated, simply taught: The Pelman–Foster System, a book of five correspondence lessons dating from around 1905.