Custer turned away from the phone, running his fingers through his hair in a characteristic gesture signifying perplexity. What should he do? The message sounded rather fishy, he thought; but it would do no harm to have a look into Jackknife Cañon around nine o’clock. If he was being tricked, the worst he could fear was that they had taken this method of luring him to Jackknife while they brought the loaded burros down from the hills by some other route. If they had done that, it was very clever of them; but he would not be fooled a second time.

Custer Pennington didn’t care to be laughed at, and so, if he was going to be hoaxed that night, he had no intention of having a witness to his idiocy. For that reason he did not take Jake with him, but rode alone up Sycamore when all the inmates of the castle on the hill thought him in bed and asleep. It was a clear night. Objects were plainly discernible at short distances, and when he passed the horse pasture he saw the dim bulks of the brood mares a hundred yards away. A coyote voiced its uncanny cry from a near hill. An owl hooted dismally from a distance; but these sounds, rather than depressing him, had the opposite effect, for they were of the voices of the nights that he had known and loved since childhood.

When he turned into Jackknife, he reined the Apache in and sat for a moment listening. From farther up the cañon, out of sight, there came the shadow of a sound. That would be the tethered burros, he thought, if the whole thing was not a trick; but he was certain that he heard the sound of something moving there.

He rode on again, but he took the precaution of loosening his gun in its holster. There was, of course, the bare possibility of a sinister motive behind the message he had received. As he thought of it now, it occurred to him that his informant was perhaps a trifle too insistent in assuring him that it was safe to come up here alone. Well, the man had put it over cleverly, if that had been his intent.

Now Custer saw a dark mass beneath a sycamore. He rode directly toward it, and in another moment he saw that it represented half a dozen laden burros tethered to the tree. He moved the Apache close in to examine them. There was no sign of men about.

He examined the packs, leaning over and feeling one. What they contained he could not guess; but it was not firewood. They evidently consisted of six wooden boxes to each burro, three on a side.

He reined the Apache in behind the burros in the darkness of the tree’s shade, and there he waited for the coming of the men. He did not like the look of things at all. What could those boxes contain? There was no legitimate traffic through or out of those hills that could explain the weekly trip of this little pack train; and if the men in charge of it were employed in any illegitimate traffic, they would not be surrendering to a lone man as meekly as his informant had suggested. The days of smuggling through the hills from the ocean was over—or at least Custer had thought it was over; but this thing commenced to look like a recrudescence of the old-time commerce.

As he sat there waiting, he had ample time to think. He speculated upon the identity and purpose of the mysterious informant who had called him up from Los Angeles. He speculated again upon the contents of the packs. He recalled the whisky that Guy had sold him from time to time, and wondered if the packs might not contain liquor. He had gathered from Guy that his supply came from Los Angeles, and he had never given the matter a second thought; but now he recalled the fact, and concluded that if this was whisky, it was not from the same source as Guy’s.

All the time he kept thinking of Shannon and her mysterious excursion into the hills. He recalled her anxiety to prevent him from coming up here to-night, and he tried to find reasonable explanations for it. Of course, it was the obvious explanation that did not occur to him; but several did occur that he tried to put from his mind.

Then from the mouth of Jackknife he heard the sound of horses’ hoofs. The Apache pricked up his ears, and Custer leaned forward and laid a hand upon his nostrils.