Note 10 — Chapter I · ROME UNDER THE KINGS.
Reading edition
“Since that time (the time of Servius Tullius) Rome has been no farther enlarged ... and if, in face of this spectacle, any one would form a notion of the magnitude of Rome, he would certainly fall into error, for he would not be able to distinguish where the town ends and where it is limited, so close the suburbs come up to the town.... The Aventine, till the reign of Claudius, remained outside the Pomœrium, notwithstanding its numerous inhabitants.” (Aulus Gellius, XIII. 14.—Dionysius of Halicarnassus, IV. 13.)