Barry Ono was a former music hall comedian whose collection of old penny bloods and penny dreadfuls was legendary amongst fans of such things. Barry (real name Frederick Valentine Harrison) bequeathed the collection to the British Library when he died in 1941, but for years it remained uncatalogued. Finally, over 50 years later, Elizabeth James and Helen R. Smith catalogued this astonishing collection in Penny Dreadfuls and Boys' Adventures: The Barry Ono Collection of Victorian Popular Literature in the British Library (London, British Library, 1998). The collection had been microfilmed some years earlier and examples from Barry's collection often pop up on John Adcock's Yesterday's Papers blog.
You can find out a little more about Barry Ono here.
(* The above film is © British Pathe Limited.)