The celebrated name which forms the title to this work will sufficiently apprise the reader that it is in the earlier half of the fourteenth century that my story opens. It was on a summer evening that two youths might be seen walking beside the banks of the Tiber, not far from that part of its winding course which sweeps by the base of Mount Aventine. The path they had selected was remote and tranquil. It was only at a distance that were seen the scattered and squalid houses that bordered the river, from amidst which rose, dark and frequent, the high roof and enormous towers which marked the fortified mansion of some Roman baron.