The interval between 6 Kan of the first column (with the month number corrected) and 1 Ymix of the second is 8 months and 17 days, as it should be; between 6 Muluc and 1 Cimi, 8 months and 17 days; and between 1 Cimi and 9 Akbal, 8 months and 17 days, thus conforming to the rule heretofore given, a fact which holds good as a general rule throughout that portion of the series in the upper division. Continuing the addition as heretofore we note the variations. Years. Months. Days. Column. Plate. 17 14 Second. 53_a_. 7 8 -- -- -- 1 7 3 Third. 53_a_. 8 17 -- -- -- 1 15 19[323-1] Fourth. 53_a_. 8 17 -- -- -- 2 6 16 Fifth. 53_a_. 8 17 -- -- -- 2 15 13 Sixth. 53_a_. 8 18[323-2] -- -- -- 3 6 11 First. 54_a_. 8 17 -- -- -- 3 15 8 Second. 54_a_. 8 17 -- -- -- 4 6 5 Third. 54_a_. 8 17 -- -- -- 4 15 2[324-1] Fourth. 54_a_. 8 17 -- -- -- 5 5 19 Fifth. 54_a_. 8 17 -- -- -- 5 14[324-2] 16 Sixth. 54_a_. 7 8 -- -- -- 6 4 4 Seventh. 54_a_. 8 18[324-3] -- -- -- 6[324-4] 13 2 First. 55_a_. 8 17 -- -- -- 7 3 19[324-5] Second. 55_a_. 8 17 -- -- -- 7 12 16 Third. 55_a_. 8 17 -- -- -- 8 3 13 Fourth. 55_a_. 8 17 -- -- -- 8 12 10 Fifth. 55_a_. 7 8 -- -- -- 9 1 18 First. 56_a_. 8 17 -- -- -- 9 10 15 Second. 56_a_. 8 17 -- -- -- 10 1 12 Third. 56_a_. 8 17 -- -- -- 10 10 9 Fourth. 56_a_. 8 17 -- -- -- 11 1 6 First. 57_a_. 8 17 -- -- -- 11 10 3 Second. 57_a_. 8 17 -- -- -- 12 1 0 Third. 57_a_. 7 8[325-1] -- -- -- 12 8 8 Fourth. 57_a_. 8 17 -- -- -- 12 17 5 First. 58_a_. 8 17