"Oh, no, they're good and strong," answered Ted.

So he and his chum both pulled on the one rein--the one to get Nicknack's head pointed straight down the path instead of off to one side, but it did no good. The goat knew what he wanted to do, and he was going to do it.

"Look out!" suddenly cried Teddy. "We're going to tip over!"

The next minute the front wheels of the wagon ran up on a little pile of dirt at one side of the path, and the cart gently tilted to one side and then went over with a rattle and a bang.

"There!" laughed Hal, as he rolled out on some soft gra.s.s. "We are over, Ted."

"I knew we were going," said Teddy as he, too, laughed and got up. "Whoa there, Nicknack!" he shouted, for the goat was still going on, dragging the overturned wagon after him.

But Nicknack did not stop until he reached a little bush, on which were some green leaves that he seemed to like very much, for he began to chew them.

"That's what he wanted all the while," said Teddy.

"Well, let him eat all he wants, and then he won't be hungry any more and he'll pull us where we want to go," advised Hal.

They did this, after setting the cart up on its wheels. When Nicknack turned away from the bush, and looked at the two waiting boys, Ted said:

"Well, I guess we can go on now."

"Yes," added Hal, "and I hope well find those blue rocks. But I don't believe we're ever going to."

At last, however, when it was getting rather late in the afternoon and Ted had said it was time to go back, Hal, who was driving the goat through a part of the woods they never before had visited, pointed to a big stone buried in the side of a hill and cried:

"Look! Isn't that rock blue, Ted?"

"It does look kind of blue, yes."

"Then it's just what we're looking for. See, there's lots of little blue rocks, too. Let's take some back to camp. Maybe they're the same kind Trouble had, and there may be gold in 'em! Come on."

They piled the rocks, which were certainly somewhat blue in color, into the wagon, and started back with them.

"We found 'em! We found 'em!" they called as they came within sight of the tents. "We got the blue rocks!"

"Well, they're pretty, certainly," said Grandpa Martin, as he picked up one from the wagon, "but they're no better than any other rocks around here, as far as I can see."

"They've got gold in 'em, Hal says," Ted stated.

"Gold? Oh, no, Curlytop!" laughed his grandfather. "I've told you there is no gold on this island."

"There's _something_ in the blue rocks," declared Hal. "Feel how heavy they are--lots heavier than any other stones around here."

"Yes, they are," agreed Grandpa Martin, as he weighed one of the stones in his hand. "There might be some iron in them, but not gold. Look out!"

he suddenly called as the stone slipped from his hand. "Look out for your toes!"

Laughing, the Curlytops and Hal jumped back. The blue stone which Grandpa Martin dropped, struck on the edge of the shovel which was out in front of the tent. As the rock hit the steel tool with a clang, something queer happened.

At once the rock began to burn with a curious blue flame, and a yellowish smoke curled up.

"Oh, the rock's on fire!" cried Janet. "The rock's on fire!"

"Yes, and look!" added Ted. "It's burning blue, just like the light we saw on the island one night."

"And how queer it smells!" exclaimed Hal.

"Sulphur!" e.j.a.c.u.l.a.t.ed Grandpa Martin.

He and the children looked at the queer blue fire that seemed to come from inside the rock. What could it mean?

CHAPTER XX

THE HAPPY TRAMP

Grandpa Martin stood looking down at the queer, burning rock. The blue fire was flaming up brighter now, and it made a strange light on the faces of the Curlytops and Hal as they gathered about. The sky was cloudy and it was getting dark.

"Oh, what is it? What is it?" asked Ted and Jan.

"It smells just like old-fashioned sulphur matches that my grandmother used to light," said Nora, who had come out, having seen the queer light from the cook-tent.

"And it _is_ sulphur that is burning," said Grandpa Martin. "That rock has sulphur in it, not gold, Hal. And it is the sulphur that is burning with the blue fire."

"But what makes it?" asked the children.

Grandpa Martin did not answer for a few seconds. He stood again looking down at the flaming blue rock. Mrs. Martin, who had started to put Trouble to bed early, came out and looked.

"It's like something I once saw in the theater," said the maid. "I don't like it--that blue light. It reminds me of the time our house was struck by lightning--that sulphur smell."

"It is the same smell," said Mr. Martin. "Curlytops, I think you have found something very queer in this blue rock. I don't know just what it is, but we'll find out. See, the stone is burning like a lump of coal now, but with a blue flame instead of red."

"Just like the night we saw the blue fire on the island before we came camping here," said Ted. "Is it the same thing, Grandpa?"

"I don't know. Perhaps it is. Where did you get the blue rocks?"

"Over in the woods," answered Hal. "There's a great big one there. As big as this tent."

"Is there?" some one suddenly asked. "Then please show me where it is!

Oh, can it be that at last I have found what I have been looking for so long?"

The Curlytops and the others turned at the sound of this new and strange voice. A man seemed to spring out of the bushes back of the tent. By the light of the blue fire Ted and Jan saw that his clothes were ragged and torn in many places.

"Oh! Oh!" gasped Jan. "That's the tramp!"

"Well, I guess maybe I do look like a tramp, all ragged and dirty as I am," laughed the man, and his voice sounded pleasant. "But I am not a regular tramp. I am Mr. Weston--Alfred Weston," he went on, speaking to Grandpa Martin. "I haven't a card with me, but when I get washed and dressed and shaved I'll look more like what I am. Excuse me for intruding this way, but I could not keep from speaking when I heard what you were talking about."