[001] again be taken from under the sign B.^{1} Since two quarters still remain, let the third [002] year begin under the same sign B. and let the calculation be made as above.^{2} Since [003] one quarter still remains, let the fourth^{3} year begin under the same sign and, the [004] calculation made, it will end under the same sign, by reason of the same quarter. [005] Thus in the same fourth year there will be two periods of six hours, one beginning and [006] the other ending the year, because of which the year could be called ‘bisextilis.’^{4} [007] Thus the whole period of four years, [calculated] by the number of days, contains [008] 1460^{5} days and one day, which is made up of the four quarters of the four preceding [009] years and completes the whole period of four years. It is called ‘excrescent’ and plays [010] no part in the period of the four following conventional years. Therefore, lest the inconvenience [011] mentioned above ensue, the excrescent day remaining from the past [012] period, the first day of the four following years is of necessity pushed back under [013] the same letter B., and there will be two days under the same sign B.^{6} Thereafter [014] let the calculation of the whole period of the four subsequent years be made in the [015] way aforesaid, and so from period to period ad infinitum.

Of the appearance of the essoinee.

[017] Therefore the essoinee ought to observe the year and day diligently, lest he appear [018] earlier or later than he ought. If he appears on an unlawful day and the demandant [019] on the same day, the tenant will [not] be in default, a protestation having been made [020] and the record of the constable [produced]. But if the demandant appears on the [021] lawful day and the tenant earlier, [or] if the demandant appears on the lawful day [022] and the tenant on the morrow, the tenant will be in default,^{7} because though the [023] tenant defaults [as before], the demandant observed his day.^{8} If on the lawful day [024] neither demandant nor tenant appears, then both are in default, because they did [025] not observe the lawful day. Hence if both appear on the morrow, let the defaults [026] balance one another, because equal offences are nullified by one another.^{9} If one [027] appears on the morrow and the other on the third day or the fourth, though they [028] are not completely in pari delicto and he will here be in default, let a balance be [029] made as above. If one of them appears on the lawful day at the Tower, and the [030] other^{10} before the justices in court, he who appeared in court