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English: Spectators await their turn as first light of sunrise approaches in Picture Canyon, Comanche National Grasslands, southeastern Colorado to witness the direct illumination of an inscribed rock knob and two smaller sandstone protrusions with vertically inscribed marks just above it, approximately 30 feet behind the protective iron gate entrance to Crack Cave at dawn on the vernal equinox, March 20, 2005. The actual equinox moment came about a half an hour earlier. Some epigraphers believe the rock knob is inscribed with the message, "The Sun Strikes (here) on the Day of Bel," in consonantal Ogham, one of more than a hundred variations of the ancient Celtic alphabet described in the fourteenth century Book of Ballymote's Ogham Tract. Sun symbol is Beim in Celtic. The vertical grooves representing the consonants B-M L H B-L may have been distorted intentionally to appear as a rebus or word picture of a balance beam. Equinoxes come only twice a year when day and night are equal.