Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
This enormous wall,
composed throughout of large hewn blocks, rose in two stories,
exclusive of the battlements and the huge towers four stories high,
to a height of 45 feet,(10) and furnished in the lower range of the
casemates stables and provender-stores for 300 elephants, in the upper
range stalls for horses, magazines, and barracks.(11)
10. Such is the height given by Appian, l. c.; Diodorus gives
the height, probably inclusive of the battlements, at 40 cubits
or 60 feet. The remnant preserved is still from 13 to 16 feet
(4-5 metres) high.
11. The rooms of a horse-shoe shape brought to light in excavation
have a depth of 14, and a breadth of 11, Greek feet; the width of
the entrances is not specified. Whether these dimensions and the
proportions of the corridor suffice for our recognizing them
as elephants' stalls, remains to be settled by a more accurate
investigation. The partition-walls, which separate the apartments,
have a thickness of 1.1 metre = 3 1/2 feet.
