"If the test of fire that comes fifth in the later list (p. 143) is discounted as a redundant elaboration based on the eventual immolation of Hunahpu and Xbalanque (which does not take place in a house), the Bat House would come fifth in the later sequence and both sequences would total five houses. These houses may correspond to the five different kinds of complete Venus cycles plotted out in the Maya calendar; each cycle includes a ninety-day period during which Venus has disappeared as the morning star and has not yet reappeared as the evening star."

Dennis Tedlock, in his translation of Popol Vuh, Simon and Schuster, 1985, p. 327.