company) carried Marks-directed sex shorts like Hole in One, Nymphomania, King Muff and Doctor Sex for sale around this period. While the Marks films offered in UK porn magazines throughout the 1970s appear to have been softcore, and their pornographic nature greatly exaggerated by the advertisements (a familiar trait of David Sullivan), from the early 1970s onwards Marks had begun experimenting with hardcore production. He made short films for a British hardcore pornographer known only as "Charlie Brown", and began making hardcore versions of his own Maximus short films which were released overseas on the Color Climax and Tabu labels. In later years Marks was reluctant to discuss these hardcore short films and claimed "not to remember" their names. Arabian Knights (also filmed for Color Climax in 1979) was shot at the Hotel Julius Caesar in Queens Gardens in Bayswater and features mainstream actor Milton Reid in a non-sex role. Other works A lover of animals, in particular felines, in the early stages of his career Marks had a sideline photographing cats, and provided the photographs for Compton Mackenzie's book Cats's Company (1960). “He was an excellent photographer of nudes," producer Tony Tenser remarked to John Hamilton in a 1998 interview, "but he also excelled in photographs of cats, that were much more beautiful than some of his nudes". Marks' cats remained a fixture of his studio and can be spotted scurrying about in several of the 8mm glamour films of the period, occasionally even appearing in prominent roles. In the wake of the success of his early "glamour" films Harrison Marks also produced a series of slapstick comedies also sold via the photographic shops and magazines that were the outlet for his adult work. As well as directing these films he also appeared as one of the main actors. Titles like Uncle's Tea Party, Defective Detectives, High Diddle Fiddle, Dizzy Decorators and Musical Maniacs were founded in the music hall and classic silent comedy traditions. Needless to say, they were less successful than his girlie films and the competition from the real thing (i.e., the Chaplin, Keaton, and Harrold Lloyd classics that he paid homage to), which provided most of the package film releases of the day. Janus and Kane In the late 1970s Marks was hired as a photographer for Janus, a fetish magazine specialising in spanking and caning imagery. He also produced and directed short erotic corporal