III. How the Maya reckoned time 37 The tonalamatl, or 260-day period 41 The haab, or year of 365 days 44 The Calendar Round, or 18,980-day period 51 The Long Count 60 Initial Series 63 The introducing glyph 64 The cycle glyph 68 The katun glyph 68 The tun glyph 70 The uinal glyph 70 The kin glyph 72 Secondary Series 74 Calendar-round dates 76 Period-ending dates 77 U kahlay katunob 79 IV. Maya arithmetic 87 Bar and dot numerals 87 Head-variant numerals 96 First method of numeration 105 Number of cycles in a great cycle 107 Second method of numeration 129 First step in solving Maya numbers 134 Second step in solving Maya numbers 135 Third step in solving Maya numbers 136 Fourth step in solving Maya numbers 138 Fifth step in solving Maya numbers 151 V. The inscriptions 156 Texts recording Initial Series 157 Texts recording Initial Series and Secondary Series 207 Texts recording Period Endings 222 Texts recording Initial Series, Secondary Series, and Period Endings 233 Errors in the originals 245 VI. The codices 251 Texts recording tonalamatls 251 Texts recording Initial Series 266 Texts recording Serpent Numbers 273 Texts recording Ascending Series 276