No editor so far seems to have investigated the source of the vehicle in this comparison. Yet Shakespeare, if it be he, as generally admitted, who wrote the scene, surely had in mind an incident in early Roman history as understood in his age. Now the obvious auctor for it would have been Livy and we shall begin with him. His first book, ad finem (1, 60.1–2), tells how Tarquin (Lucius Tarquinius Superbus), having heard, at his camp before Ardea, of the rising in Rome consequent upon Lucrece’s suicide, set out to quell it, but ‘Tarquinis clausae portae, exsiliumque indictum (the gates were closed to Tarquin and exile notified to him).’ The gates are here all right but no mention is made of the begging.

So let us try another historian, hardly less honoured and trusted by the men of the Renaissance, Dionysius of Halicarnassus. His history of early Rome had already been translated more than once from the original into a more widely accessible learned language, so that Shakespeare could read him with his 'small Latin' without resorting to his 'less Greek'.