Three points in the beliefs just mentioned should be kept in mind. First, the recurrence of the idea that the earth world is supported by a post created by the chief deity and near which he dwells. Second, the belief in the púsod nang dágat, or "navel of the sea," which is common to all of the pagan tribes of Mindanao and was also known by the ancient Bisáyas, Tagálogs, and other peoples now Christianized. It is extremely probable that this belief originated from some great whirlpool, known to the ancestors of the Philippine peoples or passed by them on their voyages. [11] Third, the belief that the sky was once very near the earth, and was raised to its present position by some deity. This belief is also common in northern Luzon. The idea of the origin of curious-shaped rocks, hills, or mountains by petrifaction of some living animal or plant is common in the Philippines. Garvan gives the two following Manóbo legends of this character: THE PETRIFIED CRAFT AND CREW OF KÁGBUBÁTANG In the old, old days a boat was passing the rocky promontory of Kágbubátang. [12] The occupants espied a monkey and a cat fighting upon the summit of the cliff. The incongruity of the thing suggested itself to them, and they began to give vent to derisive remarks, addressing themselves to the brute combatants, when, lo and behold! they and their craft were turned into rock. To this day the petrified craft and crew may be seen placed upon the promontory, and all who pass must make an offering, [13] howsoever small it be, to their vexed souls. To pass the point without making an offering might arouse the anger of its petrified inhabitants, and render the traveler liable to bad weather and rough seas. [14] The imitation of frogs is especially forbidden, for it might be followed not merely by thunderbolts but also by petrifaction of the offender, and in proof of this is adduced the legend of Angó of Bináoi. [15] THE LEGEND OF ANGÓ, THE PETRIFIED MANÓBO