"Near the centre of the platform, at a distance of eighty feet from the foot of the steps, is a square enclosure, consisting of two layers of stones, in which stands, in an oblique position, as if falling, or perhaps, as if an effort had been made to throw it down, a large round stone, measuring eight feet above the ground and five feet in diameter. This stone is striking for its uncouth and irregular proportions, and wants conformity with the regularity and symmetry of all around. From its conspicuous position, it doubtless had some important use, and, in connexion with other monuments found at this place, induces the belief that it was connected with the ceremonial rites of an ancient worship known to have existed among all Eastern nations. The Indians call this stone the Picote, or whipping-post."
Stephens, Incidents of Travel in Yucatan, Vol. 1, p. 104