Regarding tsittsit, (with reference to the discussion below) John Allen, writing here http://books.google.co.uk/books?id=n4PHt3wHE9wC&pg=PA307 claims to be quoting Leo of Modena's 'Rites and Customs' when he says the following (see image) - and references the illustration displayed as illustrative of Leo of Modena's description of how a tallet is worn.