he wears all sort of capes, he's not got much in his head

These letters can be found in the desk drawer of Nandor's room in suite 1. Each one is in its own sealed envelope, with the exception of the blank piece of paper addressed to Guillermo, which is just kind of sitting around underneath all the rest. The penmanship is fantastic and appears to have been done in fountain pen. The spelling and grammar are not as great, but we have no real canon reference point for that other than the knowledge that he spells assholes "asholes", so just do with that what you will!