730 MAYAN CALENDAR SYSTEMS [ETH. ANN. 19 
years+281 days, while that between the red series.is more than 261 
years. It is possible, therefore, that the red, which run through 
the several columns of this and the following plate, represent an 
independent series. 
There are, however, some interpolations which clearly appear to be 
corrections; for example, these two series on plate 59: 


Black Red 
Sy By (0) 6 9 0 
| 6 9:10 YR (0) | 
ea 460 | 

The day below each is 13 Muluc. Using the difference between the 

2 ahaus, + chuens, 0 days, equal to 810 days—and taking 
13 Mulue, the 2d day of the month Pop in the 
year 12 Lamatasour starting point (always count- 
black series 
ing forward when it is not otherwise stated), we 
reach the day 4 Cauac, 2 Tzec, year 1 Ezanab, 
not the correct date, as it should be 13 Mulue. 
Using the difference between the red series—4 

ahaus, 6 chuens, 0 days = 1,560 days—assuming 
the same starting point as before (13 Mulue 2 
Pop, year 12 Lamat), and counting forward 1,560 
days, we reach 13 Muluc, 2 Tzec, year 3 Lamat. 
This is a correct result, and indicates that the 
red numerals were inserted as a correction. 
On plate 69 we find a series (figure 16) repre- 
sented by symbols of the same form as those in 
the inscriptions. The glyphs Al, B1 represent 
the first date—+ Ahau 8 Cumbhu (eighteenth 
month)—which must fall in the year 8 Ben. At 
A7, B7 is the next date—9 Kan 12 Kayab. The 
intermediate counters, comparing with those dis- 
covered by Goodman in the inscriptions, are as 
follows: A5, 15 katuns; B5, 9 ahaus; A6, 4 
chuens; B6,4 days. There are other characters 
with numerals between the two dates, some of 

which may be hereafter explained, but none of 
Fic. 16—Part of plate 6, these, as will be shown hereafter, are customar- 
Dresden codex, 4 : . 
ily counted as part of the time interval. 
As I may have occasion to refer again to this series and the 
exactly similar one on plate 61, I shall only show at present the way 
in which it is to be used, and call attention to the exact similarity of 
