Note X-35 — Chapter X · ANTIQUITIES OF THE NORTHERN MEXICAN STATES.
Reading edition
Burkart gives the dimensions as 194 by 232 Rhenish feet, somewhat larger than English feet; Rivera says 35 or 40 varas square. This author also noticed on the slope of the hill before reaching the steepest part, a pyramid about 20 feet high and 11 feet square, now truncated but apparently pointed in its original condition. This was probably the heap of stones mentioned above.