Who was Roger Presbury and how was John Garrideb connected with him?

Roger Presbury was a man shot by John Garrideb over cards in a night club on the Waterloo Road in January, 1895. His appearance matched with the appearance of Waldron, the previous tenant in Nathan Garrideb's room, who acquired the note printing press. It was this printing press that John Garrideb was after and carved out the whole plan to acquire it.