Accordingly, if the calendar years were to be reckoned by this list of consuls, it was necessary to note the days of entering on and of demitting office in the case of each pair, along with such -interregna- as occurred; and this too may have been early done.

But besides this, the list of the annual magistrates was adjusted to the list of calendar years in such a way that a pair of magistrates were by accommodation assigned to each calendar year, and, where the list did not suffice, intercalary years were inserted, which are denoted in the later (Varronian) table by the figures 379, 383, 421, 430, 445, 453.

From 291 u.c.

(463 B.C.) the Roman list demonstrably coincides, not indeed in detail but yet on the whole, with the Roman calendar, and is thus chronologically certain, so far as the defectiveness of the calendar itself allows.

The 47 years preceding that date cannot be checked, but must likewise be at least in the main correct.( 12) Whatever lies beyond 245 remains, chronologically, in oblivion.
Capitoline Era No era was formed for ordinary use; but in ritual matters they reckoned from the year of the consecration of the temple of the Capitoline Jupiter, from which the list of magistrates also started.
Annals The idea naturally suggested itself that, along with the names of the magistrates, the most important events occurring under their magistracy might be noted; and from such notices appended to the catalogue of magistrates the Roman annals arose, just as the chronicles of the middle ages arose out of the memoranda marginally appended to the table of Easter.