Collecting correspondence and detecting Dickens

Des Schollum, the owner of The House of Books in Lower Hutt boasts one of the country's largest collections of private letters and is a leading expert on signature forgery. Recently he was instrumental in establishing whether or not a Charles Dickens letter was a fraud. He joins Kathryn Ryan to talk about how to separate fakes from the genuine article and his near 50 year passion for collecting private letters from the rich and famous.