The student will note in the preceding example (fig. 81) that Initial-series, Secondary-series, and Period-ending dating have all been used together in the same text, glyphs 1-4 recording an Initial-series date, glyphs 6a and 7, a Secondary-series date, and glyphs 7 and 8a, a Period-ending date. This practice is not at all unusual in the inscriptions and several texts illustrating it are figured below. TEXTS RECORDING INITIAL SERIES, SECONDARY SERIES, AND PERIOD ENDINGS In plate 23 is shown the inscription on Stela 3 at Piedras Negras. The introducing glyph appears in A1 and is followed by the Initial-series number 9.12.2.0.16 in B1-B3. This number reduced to units of the first order and counted forward from its starting point will be found to reach the terminal date 5 Cib 14 Yaxkin, which the student will readily recognize in A4-B7; the "month-sign indicator" appearing very clearly in A7, with the coefficient 9 affixed to it. Compare the day sign in A4 with figure 16, _z_, and the month sign in B7 with figure 19, _k, l_. The Initial Series recorded in A1-A4, B7 reads, therefore, 9.12.2.0.16 5 Cib 14 Yaxkin. In C1 D1 is recorded the number 0 kins, 10 uinals, and 12 tuns; that is, 12.10.0, the first of several Secondary Series in this text. Reducing this to units of the first order and counting it forward from the terminal date of the Initial Series, 5 Cib 14 Yaxkin, the terminal date of the Secondary Series will be found to be 1 Cib 14 Kankin, which the student will find recorded in C2b D2a. The Initial-series value of this latter date may be calculated as follows: 9.12. 2. 0.16 5 Cib 14 Yaxkin 12.10. 0 9.12.14.10.16 1 Cib 14 Kankin Following along the text, the next Secondary-series number appears in D4-C5a and consists of 10 kins,[222] 11 uinals, 1 tun, and 1 katun; that {234} is, 1.1.11.10. Reducing this number to units of the first order and counting it forward from the date next preceding it in the text, that is, 1 Cib 14 Kankin in C2b D2a, the new terminal date reached will be 4 Cimi 14 Uo, which the student will find recorded in D5-C6. Compare the day sign in D5 with figure 16, _h, i_, and the month sign in C6 with figure 19, _b, c_. The Initial-series value of this new date may be calculated from the known Initial-series value of the preceding date: 9.12.14.10.16 1 Cib 14 Kankin 1. 1.11.10 9.13.16. 4. 6 4 Cimi 14 Uo