The article presents proofs of the authorship of the book "Hocus Pocus Junior." Topics cited include the use of the terms, Hocus Pocus, as the pseudonym of a juggler, importance of secrecy as the critical part of the juggler's work, meaning of the terms, printed by him, during the first publication of the book in 1634, and similarity of Hocus Pocus with author William Vincent who used Hocus Pocus as his alias.