"How?"

"Fasten his tail down."

The other boys laughed at Ned, but he got a piece of rope used to tie the ladder on the donkey's back, and attached it to the beast's tail. Then he put a stone on the rope. Whether this caused it or not the boys could not tell, but the donkey did not bray after that.

"I think we'd better make a little change in our plans," suggested Frank.

"We were going to stay here until night, at least you three were. Now I think we had all better go back to camp and take the donkey with us. We have time enough, and it will be tiresome waiting here until dark. I've got to go back to get the canoe. You had better come along. We'll have something to eat and we can leave the donkey at the tent.

"When we have rescued my father you boys can wait until it's light enough to follow the telephone line back to camp. In the meanwhile I'll go on with him in the canoe."

"What about the ladder?" asked Ned.

"We'll hide it in the woods," said Frank. "We'll not try to take it back to Mr. Armstrong, but I'll pay him for it. I think it would be too risky to come back for it. If we get my father away from there they'll be sure to be on the lookout for hours afterward, and we can't always depend on the donkey not braying. Besides, it's a lot of work and risk, and it's better to pay for the ladder and leave it here. It's worth it to me."

The other boys thought this plan a good one. Accordingly, after the ladder had been put in the ditch, the boys started back for camp, taking the donkey with them. The animal seemed to have lost all desire to play any tricks.

The rain had stopped when the chums got back to their tent, and they made a fire to dry themselves out a bit. The donkey was tethered so he could go under the shelter canvas in case of more showers, that still threatened, and the boys, after getting themselves something to eat, and feeding the animal, prepared to start again for the sanitarium.

Frank got into the canoe, and, with a wave of his hand paddled off, calling to his chums that he would meet them about dusk at the ditch where the ladder was hidden.

It was now well on into the afternoon. The three chums, discussing the probable outcome of the affair, walked on through the woods. They carried light lunches with them, and some flasks of cold coffee, for they would not be back at camp again until time for a late breakfast. Frank also took some food with him in the boat.

The three boys found Frank waiting for them at the ditch, at which they arrived at dark. It was raining again, harder than before, but they managed to find a clump of trees with thick leaves that served as a partial shelter.

"Did you have any trouble getting here with the boat?" asked Ned of Frank.

"None at all. I came faster than I ever had before, as the water was high from the rain. The current is swift, and that will make it hard going back."

"Maybe one of us could go with you," suggested Bart. "The canoe will hold three on a pinch."

"I think it would be a good plan," Frank replied.

"Then I'll go," Bart went on. The other boys did not dispute his right, as he was the best paddler.

It seemed that the time would never come for the attempt to be made. In the darkness and rain the boys waited, for Frank had said it would not be safe to try until ten o'clock. At that hour the night watch went on, and the sanitarium was more quiet.

"Let's get the ladder out and lay it along the edge of the gra.s.s plot,"

suggested Ned. "No one can see us, and it will be something to do."

They followed this advice, and the ladder was placed in readiness at the edge of the asylum grounds. Once more they resumed their waiting. How the rain pelted down! The wind too, had increased, and it blew through the trees with a mournful sound. It was dark and chilly in the woods, and, in spite of their raincoats, the boys were anything but comfortable. It seemed as though ten o'clock would never come.

Frank had a small pocket electric light with him, run by a dry battery, and, by pressing a b.u.t.ton, a faint glow could be had. By means of this the boys frequently glanced at their watches.

"I'm not going to look again until I think it's ten o'clock," declared Frank. But he could not resist, and, after waiting what seemed like an hour he glanced at the time-piece again. It was half-past nine.

"Half an hour more," he announced. "That will be the longest of all."

It was, but ten o'clock came at last. Cautiously the boys stole from their hiding places. They picked up the ladder and looked toward the asylum building. It was dark, save where a faint light showed through one window, and Frank knew this was in a corridor.

"Do you know which is the window of his room?" asked Ned.

"Yes," replied Frank. "It's the third one from the right hand end of the building, in the second story. The ladder will more than reach, as the windows are low ones."

Foot by foot they advanced, listening every little while, to find out if their approach was noticed. But there was only the wind and rain to be heard.

"Here we are," whispered Frank, as they came to a halt beneath the window of room twenty-eight. "Now help me raise the ladder."

Four pair of st.u.r.dy young arms soon accomplished this, though it was hard work. While the three boys steadied the ladder at the bottom, Frank went up it. He held some pebbles in his hand and, when he could safely throw them at the gla.s.s he did so, making the signal agreed upon with his father. The little stones made more noise than he supposed they would, but he hoped no one but Mr. Roscoe would hear them. Frank, standing on the ladder under the window waited anxiously.

Suddenly the window sash, to the left of the one where he thought his father was, went up softly. A head was thrust out.

"I wonder if I have made a mistake," Frank thought. The next instant he heard a voice calling to him.

"They have taken the king of the cannibal islands away!"

Frank recognized the voice as that of the insane man who had caused a disturbance the first night he was on duty.

"Where have they taken him?" asked Frank, and he hoped the man could answer rationally.

"They have taken him away," the man went on. "I know! I'm crazy but I know. The cannibals have taken the king away. Ha! Ha! A good joke!"

He was speaking and laughing in low tones.

"I have come to rescue him. He is my father! Can't you tell me where he is?" pleaded Frank.

"Good boy! Rescue father," whispered the lunatic. "I know. My head is a barrel, and if I came down the ladder I would fall. I don't want to be rescued. I own this place. But number twenty-eight. Yes, he ought to go. He's all right. They give him bad stuff to eat. I'm a barrel, but I own this place. It's barreled up inside of me. This side up with care!

C. O. D. you know. Pay all charges. Ha! Ha! Good joke! They took the king away."

"But where?" persisted Frank. Was his plan to fail? Had the asylum authorities found out about it and removed his father?

"What's the matter?" called Bart from below.

"Think!" whispered Frank to the lunatic. "Tell me where he is! I want to take him away!"

"That's right! Take him away. This is no place for him. This is a place for barrels. Listen," and the man leaned far out of the window. "He's on the north side, in a room just like the one he was in, only on the top floor. I know! They tried to fool me but I hid in a barrel and I found out. It was a barrel with the hoops off, and I saw them take the king of the cannibal islands away. It's a great joke! I'm a barrel!"

"Is it on the other side?" asked Frank, wanting to be sure.

But the lunatic had shut his window. It was all black and dark again, and the rain and the wind seemed a fitting accompaniment for the sorrow that was in Frank's heart. He came down the ladder.

"What's the matter?" asked his chums, and he told them.

"Let's try the other side. Try the third window from the end, on the top floor," suggested Ned. "It can't do any harm. Maybe the crazy man spoke the truth. Sometimes they do."

"It's worth trying, anyhow," said Bart, and, though Frank did not have much hope, he agreed with his chums.

The ladder was carried around the building. As the boys looked up they saw all the windows were in darkness save one. That one was in the top row, and was the third from the end.