One type of show biz that Charles Dickens did not participate in, promote, or enjoy was Street Music in the Metropolis.  In the 1860ís organ grinders, generally accompanied by a trained monkey, would station themselves outside a residence in an upscale neighborhood of London and play their organs until the resident opened the door and paid the monkey a shilling.  Then the organ grinder with his monkey would go away and repeat the performance a few doors down the block.  This blackmail finally prompted Michael T. Bass, M.P. to introduce a bill in Parliament to stop this street music.  Bass also solicited letters from influential Londoners to join his crusade.  Charles Dickens wrote a letter of support, which was also signed by a number of writers and artists including Alfred Tennyson, John Millais, Wilkie Collins and Thomas Carlyle.  Dickensís letter reads in part ď[We] are driven nearly mad by street musicians.  [Our] homes are beleaguered by discordant hosts seeking to be bought off.Ē  Another proponent of Bassís bill was Charles Babbage, a brilliant mathematician and an originator of the modern computer.  Babbage submitted statistics to support his argument.  In his letter to Bass, he states that over a ninety day period, he was harassed 165 times by street music; nine times by brass bands, ninety-six times by organ grinders, and sixty times by organ grinders with monkeys.  Bass published his argument with supporting letters in the book exhibited here.  Street Music in the Metropolis is a rare item of Dickensiana.