 After his marriage to Virginia Lee, Mason worked to support his young family in a variety of capacities in the Manchester area before finding his profession as an antiquarian bookseller.With the uncanny knack of the bookselling professional to assess the importance of a book or a private library at a single glance, Mason became a recognised specialist in the esoteric scientific texts published during the psychedelic era.In the 1990s, Mason met and studied with the author and scholar, Terence McKenna.