The next text presented (pl. [6], C) shows the Initial Series from Stela I at Quirigua.[[125]] Again, as in plate [6], A, the introducing glyph occupies the space of four glyph-blocks, namely, A1-B2. Immediately after this, in A3-A4, is recorded the Initial-series number 9.18.10.0.0, all the period glyphs and coefficients of which are expressed by normal forms. The student's attention is called to the form for 0 used with the uinal and kin signs in A4a and A4b, respectively, which differs from the form for 0 recorded with the uinal and kin signs in plate [6], A, B4, and A5, respectively. In the latter text the 0 uinals and 0 kins were expressed by the hand and curl form for zero shown in figure [54]; in the present text, however, the 0 uinals and 0 kins are expressed by the form for 0 shown in figure [47], a new feature.
Reducing the above number to units of the 1st order by means of Table [XIII], we have:
| A3 = | 9 × | 144,000 = | 1,296,000 |
| B3a = | 18 × | 7,200 = | 129,600 |
| B3b = | 10 × | 360 = | 3,600 |
| A4a = | 0 × | 20 = | 0 |
| A4b = | 0 × | 1 = | 0 |
| ———— | |||
| 1,429,200 | |||
Deducting from this number all the Calendar Rounds possible, 75
(see Table [XVI]), it may be reduced to 5,700 without affecting its value in the present connection.
Applying rules 1 and 2 (pp. [139] and [140], respectively) to this number, the day reached will be found to be 10 Ahau; and by applying rule 3 (p. [141]), the position of this day in the year will be found to be 8 Zac. Therefore, by calculation we have determined that the terminal date reached by this Initial Series is 10 Ahau 8 Zac. It remains to find this date in the text. The regular position for the day in Initial-series terminal dates is immediately following the last period glyph, which, as we have seen above, was in A4b. Therefore the day glyph should be B4a. An inspection of this latter glyph will show that it records the day 10 Ahau, both the day sign and the coefficient being unusually clear, and practically unmistakable. Compare B4a with figure [16], e'-g', the sign for the day name Ahau. Consequently the day recorded agrees with the day determined by calculation. The month glyph in this text, as mentioned on page [157], footnote 1, occurs out of its regular position, following immediately the day of the terminal date.
As mentioned on page [153], when the month glyph in Initial-series terminal dates is not to be found in its usual position, it will be found in the regular position for the month glyphs in all other kinds of dates in the inscriptions, namely, immediately following the day glyph to which it belongs. In the present text we found that the day, 10 Ahau, was recorded in B4a; hence, since the month glyph was not recorded in its regular position, it must be in B4b, immediately following the day glyph. By comparing the glyph in B4b with the month signs in figure [19], it will be found exactly like the month sign for Zac (s-t), and we may therefore conclude that this is our month glyph and that it is Zac. The coefficient of B4b is quite clearly 8 and the month part therefore reads, 8 Zac. Combining this with the day recorded in B4a, we have the date 10 Ahau 8 Zac, which corresponds with the terminal date determined by calculation. The whole text therefore reads 9.18.10.0.0 10 Ahau 8 Zac.
Fig. 67. Signs representing the hotun, or 5-tun, period.