Note 21 — Chapter II · THE TYRANNY OF THE FOURTEENTH CENTURY.
S. G. C. (Samuel George Chetwynd) Middlemore translation
The Paduan passport office about the middle of the fourteenth century is referred to by Franco Sacchetti, Nov. 117, in the words, ‘quelli delle bullete.’ In the last ten years of the reign of Frederick II., when the strictest control was exercised on the personal conduct of his subjects, this system must have been very highly developed.