This lintel does not contain a date. Nevertheless, like lintels 18 and 21, it was apparently reset in Structure 22 by Bird Jaguar IV (Proskouriakoff 1964: 182), and can be palaeographically dated to the late 5th or early 6th-century.
As Tate (1992:202) notes, the glyphic style and monumental form of this lintel suggest that it was the pair of Lintel 20. Also like that lintel, it is all-glyphic. The text appears to begin at the outset of a parentage expression, suggesting that it continues from an earlier lintel. Unfortunately, the loss of the initial part of the text and the substantial erosion, coupled with a dearth of texts of comparable age, make a full understanding difficult to achieve.
Nevertheless, one of the K'inich Tatbu Jol names is conspicuous at B5-A6. While Martin and Grube (2000:120-1) have taken this as evidence for an attribution to the tenth king, K'inich Tatbu Jol II (Ruler 10), the name seems to be embedded in a parentage phrase, suggesting that the monument may have been commissioned by his son instead. Another difficulty stems from the repetition of this nominal phrase at Yaxchilan. In fact, given our lack of knowledge of the wives of any of the Yaxchilan kings of this time period, it seems equally possible that this lintel was commissioned by the seventh ruler, "Moon Skull" (quite possibly although not certainly the son of the eighth ruler, K'inich Tatbu Jol I).
One piece of support for this idea comes from the text of Lintel 21 which, as we have seen, refers back to the dedication of an earlier version of Structure 22 during the late fifth-century reign of "Moon Skull". It would stand to reason that this reference acknowledges the origination of the early lintels (18, 19, 20 and 22) with "Moon Skull", who would then be the son of the eighth ruler (K'inich Tatbu Jol I) and his wife or consort, Lady G1.
TRANSCRIPTION, TRANSLITERATION AND TRANSLATION
Complete text (A1-D8):
?- la-si U-MIJIIN?-na i-ti pa-ti yi-pi ya-je-la ya-AL-la- ? [ CHAN ?] YOPAAT 7- CHAPAHT-TZIKIN?-K'INICH? K'INICH *ta 2 -* bu-JOL ? U?- ? K'UH-*o-OHL? ?- la-IXIK ? ? IXIK se?- ?- na ?-? 3? ?-? KAB? K'UH?- ? MIJIIN?-na TE'-*ku-*yu XUKUB?- ? [* CHAN ]? mi?-*xi-*NAL ? *PA'-*CHAN-ma *AJAW
? u-mijiin? it-i pat-i yipyajeel y-al-? chan?-yopaat, huk-chapaht-tzikin-k'inich k'inich tatbu jol, u?-? k'uh-ohl? ?-ixik ? ? ixik-? ? uhx-? ? kabal k'uh? mijiin? te'-kuy-xukuub-? chan?-? mixnal? ? pa'chan-ajaw
A translation is inadvisable at this time.