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 Here their three companions were awaiting them. Tarzan passed to the left side of the niche and examined the pegs that lay within reach. He looked at them but it was not his eyes that were examining them. Keener than his keen eyes was that marvelously trained sense of scent that had first been developed in him during infancy under the tutorage of his foster mother, Kala, the she-ape, and further sharpened in the grim jungles by that master teacher—the instinct of self-preservation.

From the left side of the niche he turned to the right. Om-at was becoming impatient.

"Let us be off," he said. "We must search for Pan-at-lee if we would ever find her."

"Where shall we search?" asked Tarzan.

Om-at scratched his head. "Where?" he repeated. "Why all Pal-ul-don, if necessary."

"A large job," said Tarzan. "Come," he added, "she went this way," and he took to the pegs that led aloft toward the summit of the cliff. Here he followed the scent easily since none had passed that way since Pan-at-lee had fled. At the point at which she had left the permanent pegs and resorted to those carried with her Tarzan came to an abrupt halt. "She went this way to the summit," he called back to Om-at who was directly behind him; "but there are no pegs here."

"I do not know how you know that she went this way," said Om-at; "but we will get pegs.