glyphs for, only ones deciphered, [26], [31]

lapse of, determination, [134]-[155]

expression, [63]-[64], [105]-[107]

indicated by black glyphs, [251]

marked by monuments, [33]-[35], [249]-[250]

method of describing, [46]-[48]

recording, [33]-[36]

use of numbers, [134]

starting point, [60]-[62], [113]-[114], [124]-[125]

See also Chronology.