"The hieroglyphic text is on the back (east) side and is unusually arranged in a diagonal pattern, now somewhat eroded. The Initial Series introductory glyph appears at the upper right corner, followed by seven diagnonal double-row blocks of hieroglyphs, each containing eight glyphs (except for the final block with four glyphs) that are read in double columns. The first seven glyphs of the initial block record the Initial Series date of 220.127.116.11.0 using bar-and-dot notation.
Only one other Maya monumental text is known to follow this diagnoal pattern, that being Cancuen Stela 3, a fragmentary sculpture from a small site in the southernmost lowlands some 150 km (90 miles) northwest of Quirigua. Monument 8 is often compared to Copan Stela J, but the text on the latter monument, while diagonal, is actually read in a completely different order, following a much more complex interwoven "mat" pattern."
Robert J. Sharer, Quirigua: A Classic Maya Center & Its Sculptures, Carolina Academic Press, 1990, p. 45