250 THE INSCRIPTIONS AT COPAN. 
Date 18. 



Date 18 occurs on a single block, which shows the first two @Q09— 
glyph-blocks of an Initial Series, the introducing glyph being at a 8 
and the cycles and katuns at B. (See Gordon, 1902, plate 12, R, 
fourth block.) The cycle coefficient, Ba, is 9 and the katun coefficient, Bd, 
is 5. The block ends after the katuns. 
DaTE 19. 
Date 19 occurs on a single block 58 cm. long, presenting the Initial 
Series introducing glyph at a, and 9 cycles at Ba. The break occurs in the 
middle of the second glyph-block between the cycles and the katuns; the 
latter are missing. There is another stone, which came from nearby (Gordon, 
1902, plate 12, Q, fourth block) which shows katuns and tuns in two different 
glyph-blocks. The a # katun coefficient is § or under, and the tun 
coefficient 6, 7, or 8. EM Soy Th style of the glyphs with bar-and-dot 
coefficients above strongly resembles the style of the glyphs and 
coefficients in Dates 1, 3, 5, 15, 16, 17, 18, 19, and 20. But of these nine 
Initial Series the only ones without their corresponding katun-glyphs are 
Dates 19 and 20. It isnot improbable, therefore, that this block may join the 
block on which Date 1g starts, and may declare its katuns and tuns. If so, 
the best reading would appear to be 9.5.6.?.?. 
That this block is more likely to have been part of Date 19 than Date 
20 seems probable from the fact that the cycle-sign is missing from Date 20, 
and if this block should record its corresponding katuns and tuns, it is neces- 
sary to assume that the corresponding cycle-sign was Peracden on a very 
narrow piec® <ofténe? perhaps not more than 18 cm. wide, which would 
have been, contisry-to. the-usual practice of using fairly long blocks of stone 
in the stairway. 
Date 20. 
Date 20 occurs on a block 43 cm. long. It presents only the Initial 
Series introducing glyph and the cycle coefficient, which is 9. ‘The cycle- 
sign is missing. ‘The variable element of the Initial Series introducing glyph 
is the kin-sign, which is also the corresponding element in the Initial Series 
introducing glyph of Date 28. Dates 15 to 20 inclusive are early, perhaps 
allin Katun 5. All six were probably from the left ends of the steps on which 
they were inscribed, and, as will be shown later, all six probably came from 
steps immediately above those now in situ, 1. e., from section ex, figure 37. 
Date 21. 
Date 21 has already been noted in the discussion of Date 15 (plate 26, c). 
It occurs on a block incorrectly shown in a Peabody Museum photograph 
(No. 385) as standing between the two blocks of Date 15. The first glyph 
is the lahuntun-sign, followed by the date 7 Ahau 3 Cumhu. (See figure 38, 7.) 
The lahuntun-sign fixes this date as ending some even half-katun of the 
