The surprise of the robber chief instantly changes to anger. For a suspicion flashes across his mind, that his late appointed lieutenant has played false to him.

He knows that Richard Darke has only been one of his band by the exigency of sinister circumstances; knows, also, of the other, and stronger lien that has kept Clancy’s assassin attached to their confederacy—his love for Helen Armstrong. Now that he has her—the sister too—why may he not have taken both off, intending henceforth to cut all connection with the prairie pirates? Bosley would be no bar. The subordinate might remain faithful, and to the death; still Quantrell could kill him.

It is all possible, probable; and Borlasse, now better acquainted with the character of Richard Darke, can believe it so. Convinced of his lieutenant’s treachery, he rages around the tree like a tiger deprived of its prey.

Little cares he what has become of Darke himself, or Helen Armstrong. It is Jessie he misses; madly loving her in his course carnal fashion. He had hoped to have her in his arms, to carry her on to the rendezvous, to make her his wife in the same way as Darke threatened to do with her sister.

Fortunately for both, the sky has become clouded, and the moon is invisible; otherwise he might see that the ground has been trodden by a half-dozen horses, and discover the direction these have taken. Though Simeon Woodley, with his party, is now a good distance off, it would still be possible to overtake them, the robbers being well mounted and better knowing the way. Woe to Helen and Jessie Armstrong were the moon shining, as when they parted from that spot!

Neither Borlasse nor his confederate have a thought that any one has been under the oak, save Quantrell, Bosley, and the captives. How could they? And now they think not that these have been there; for, calling their names aloud, they get no response. Little do the two freebooters dream of the series of exciting incidents that in quick succession, and so recently, have occurred in that now silent spot. They have no suspicion of aught, save that Bosley has betrayed his trust, Phil Quantrell instigating him, and that both have forsaken the band, taking the captives along.

At thought of their treachery Borlasse’s fury goes beyond bounds, and he stamps and storms.

To restrain him, Chisholm says, suggestingly, “Like as not, Cap’, they’re gone on to head-quarters. I guess, when we get there we’ll find the whole four.”

“You think so?”

“I’m good as sure of it. What else could they do, or would they? Quantrell darn’t go back to the States, with that thing you spoke of hangin’ over him. Nor is he like to show himself in any o’ the settlements of Texas. And what could the two do by themselves out on the wild prairie?”