or common calendar;
the other, the religious calendar used by the priests alone in arranging
their feasts and ceremonies, in which the cycle of 260 days was taken as
the basis. But this supposition will not suffice as an explanation of
some of the long series of the Dresden Codex, in which the year of 360
days appears to have been taken as a unit of measure, unless we
assume--as Foerstemann seems to have done--that what have been taken as
years are simply high units and counting the whole as so many days, refer
the sum to the cycle of 260 days, which will in almost every case measure
them evenly as a whole, or by its leading factor, 13. That the smaller
series attached to day columns are all multiples of 13 and referable to
the cycle of 260 days has been shown by Foerstemann as well as in the
preceding part of this paper. But it is worthy of note that the
difficulty mentioned occurs only in reference to series found in that
portion of the Dresden manuscript which Foerstemann has designated Codex B
(page 24 being considered as belonging thereto).

The red unit number symbol, with a circle of dots around it, seen
occasionally in the Manuscript Troano, seems to have some connection with
the four year series. Take, for example, the one in the lowest division
of Plate VII.

The series commences in the lower right hand corner of Plate VIII, where
the day column with which it is connected is found. The days of this
column, reading downward, are as follows: Ahau, Eb, Kan, Cib, Lamat, and
the number over them is I, but without any dots around it, while the
terminal I of the series is inclosed in the circle of dots. What is the
meaning of this marked distinction? It is evident that it is something
which does not apply equally to all the days of the columns; yet, as it
is the terminal number, it must relate to some one of them. If we examine
the series carefully I think the reason for the distinction will be
explained; Written out in full, it is as follows:

I.
Ahau
Eb }
Kan } 10, XI; 10, VIII; 10, V; 10, II; 12[?], [(I)].
Cib
Lamat

The last black number is 10 in Brasseur's fac simile, but should be 12.
Making this correction, the series is regular and of the usual form. The
sum of the black numbers is 52, which is the interval between the days,
and the number over the column is the same as the final red number.

If we turn now to the calendar (Table II) and select Ahau of the Kan
column, and 1, the seve