Just as they were on the point of descending, Barney gave a cry, caught Frank by the arm, and drew him toward a window.

"Look there, me b'y!" exclaimed the Irish lad. "Phwat do yez think av it now?"

A horseman was coming down the old road that led to the mill. He bestrode a coal-black horse, and a mask covered his face, while his long, black hair flowed down on the collar of the coat he wore. He sat the horse jauntily, riding with a reckless air that seemed to tell of a daring spirit.

"Great Scott!" exclaimed Frank Merriwell, amazed. "It is Muriel!"

"That's pwhat!" chuckled Barney. "An' it's your trate, me lad."

"I will treat," said Frank, crestfallen. "I am not nearly so smart as I thought I was."

"Muriel?" cried Kate, dashing to the window. "Where is he?"

She did not hesitate to appear in the window and signal to the dashing young moonshiner, who returned her salute, and motioned for her to come out.

"He wants ter see me in er hurry," said the girl. "I sent word ter him by Dummy that ther boys war har, an' that's how he happened ter turn up.

Come, Rufe, go out with me. Muriel will be glad to see yer."

"And I shall be glad ter see him," declared the escaped convict.

Kate bade the boys remain there, telling them she would call them if they were wanted, and then, with Rufe following, she hurried down the stairs, and hastened to meet the boy moonshiner, who had halted on the bank at some distance from the old mill.

Watching from the window, Frank and Barney saw her hasten up to Muriel, saw her speak swiftly, although they could not hear her words, saw Muriel nod and seem to reply quite as swiftly, and then saw the young leader of the Black Caps shake her hand in a manner that denoted pleasure and affection.

"Ye're a daisy, Frankie, me b'y," snickered Barney Mulloy; "but fer wance ye wur badly mishtaken."

"I was all of that," confessed Frank, as if slightly ashamed. "I thought myself far shrewder than I am."

As they watched, they saw Rufe Kenyon suddenly leap up behind Muriel, and then the doubly burdened horse swung around and went away at a hot pace, while Kate came flitting back into the mill.

"The officers are returnin'," she explained. "Muriel will take Rufe whar thar ain't no chance o' their findin' him. You-uns will have ter stay har. I have brung ye more fodder, an' I judge you'll git along all right."

So she left them hurriedly, being greatly excited over the return of her brother and his danger.

The day pa.s.sed, and the officers failed to appear in the vicinity of the mill, although the boys were expecting to see them.

Nor did Wade Miller trouble them.

When night came Frank and Barney grew impatient, for they were far from pleased with their lot, but they could do nothing but wait.

Two hours after nightfall a form suddenly appeared in the old mill, rising before the boys like a phantom, although they could not understand how the fellow came there.

In a flash Frank s.n.a.t.c.hed out a revolver and pointed it at the intruder, crying, sternly:

"Stand still and give an account of yourself! Who are you, and what do you want?"

The figure moved into the range of the window, so that the boys could see him making strange gestures, pointing to his ears, and pressing his fingers to his lips.

"Steady you!" commanded Frank. "If you don't keep still, I shall shoot.

Answer my question at once."

Still the intruder continued to make those strange gestures, pointing to his ears, and touching his lips. That he saw Frank's revolver glittering and feared the boy would shoot was evident, but he still remained silent.

"Whoy don't th' spalpane spake?" cried Barney. "Is it no tongue he has, Oi dunno?"

That gave Frank an idea.

"Perhaps he cannot speak, in which case he is the one Kate calls Dummy.

I believe he is the fellow."

It happened that the sign language of mutes was one of Frank's accomplishments, he having taken it up during his leisure moments. He pa.s.sed the revolver to Barney, saying:

"Keep the fellow covered, while I see if I can talk with him."

Frank moved up to the window, held his hands close to the intruder's face, and spelled:

"You from Kate?"

The man nodded joyfully. He put up his hands and spelled back:

"Kate send me. Come. Horses ready."

Frank interpreted for Barney's benefit, and the Irish lad cried:

"Thin let's be movin'! It's mesilf that's ready ter git out av thase parruts in a hurry, Oi think."

For a moment Frank hesitated about trusting the mute, and then he decided that it was the best thing to do, and he signaled that they were ready.

Dummy led the way from the mill, crossing by the plank, and plunging into the pine woods.

"He sames to be takin' us back th' woay we came, Frankie," said the Irish lad, in a low tone.

"That's all right," a.s.sured Frank. "He said the horses were waiting for us. Probably Kate is with them."

The mute flitted along with surprising silence and speed, and they found it no easy task to follow and keep close enough to see him. Now and then he looked back to make sure they were close behind.

At last they came to the termination of the pines, and there, in the deep shadows, they found three horses waiting.

Kate Kenyon was not there.

Frank felt disappointed, for he wished to see the girl before leaving the mountains forever. He did not like to go away without touching her hand again, and expressing his sense of grat.i.tude for the last time.

It was his hope that she might join them before they left the mountains.

The horses were saddled and bridled, and the boys were about to mount when a strange, low cry broke from Dummy's lips.

There was a sudden stir, and an uprising of dark forms on all sides.

Frank tried to s.n.a.t.c.h out his revolver, but it was too late. He was seized, disarmed, and crushed to the earth.