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."