"There." Blake pointed toward the south.

"When?"

"About an hour ago."

"You'd better shed that armor," advised Tarzan, "it makes walking a punishment—I just tried it."

With the ape-man's help Blake got out of his coat of mail and then the two set out upon the plain trail of the Arabs. At the point where Ibn Jad had turned back toward the north they were at a loss to know which of the two spoors to follow, for here the footprints of Guinalda, that the ape-man had been able to pick up from time to time since they left the spot where the girl had been seized, disappeared entirely.

They wondered what had become of them. They could not know that here, when she found that Ibn Jad was going to turn back with her away from Nimmr, she had refused to walk farther. It had been all right as long as they were approaching Nimmr, but she refused absolutely to be a party to her own abduction when it led away from home.

What breeze there was was blowing from the east, nullifying the value of Tarzan's sense of smell so that even the great ape-man could not know in what direction or with which party Guinalda had been carried off.

"The most reasonable assumption," said Tarzan, "is that your princess is with the party that has gone north, for I know that Ibn Jad's menzil must lay in that direction. He did not enter the valley from the south. That I know because I just came in that way myself and Sir Bertram assured me that there are only two entrances—the one through which I came and a pass above the City of the Sepulcher.

"Ibn Jad would want to get the girl out of the valley and into his camp as soon as possible whether he is going to hold her for ransom or take her north to sell her. The party that went south toward Nimmr may have been sent to treat with her people for a ransom; but the chances are that she is not with that party.

"However, it is at best but a matter of conjecture. We must ascertain definitely, and I suggest that you follow the northern spoor, which is, I am certain, the one that will lead to the girl, while I overtake the party to the south.