Two of Berkeley's stories in The Guardian (numbers 35 and 38), each titled 'The Pineal Gland', constitute an early instance of philosophical speculative fiction. Armed with the device of a magic snuff that transports him to the Cartesian pineal glands of his adversaries, Berkeley's protagonist uses it “to distinguish the real from the professed sentiments of all persons of eminence in court, city, town, and country”.[6]
Button's Coffee House in Russell Street, Covent Garden, acted as an ad hoc office for the newspaper.[7] Contributors submitted written material in a marble lion's head letterbox, said to have been designed by the artist William Hogarth, for possible publication in The Guardian.
The Gentleman's Magazine[8] followed on the heels of The Guardian, being touted by Richard Steele as a sequel of it.