Jan went to the edge and looked down in the hole. It seemed to be a large one in between two big rocks, and Ted showed her where the hole slanted downward and went farther underground. It was dark there, and Jan made up her mind she would never go into it, even if Ted did.

"You'd better come up," she said at last. "Maybe mother wouldn't like it. Besides, there might be snakes down in there."

"Oh! I didn't think about them!" exclaimed Ted, and he tried to scramble up, but it was not so easy as he had hoped. He was a little excited, too, since Janet had spoken of snakes. Teddy did not like them, and they might be in among the leaves that had fallen down into the hole with him.

"Can't you get up?" Jan asked, when her brother had slipped back two or three times.

"Maybe I could if you'd let me take hold of your hand," suggested Teddy.

"Then you'd pull me in, and we'd both be down there."

Ted saw that this was so. He tried again to get out, but could not, for mixed with the leaves were many dry, brown pine needles from the trees growing overhead; and if you have ever been in the woods you know how slippery pine needles are when the ground is covered with them. Teddy slipped back again and again.

"Oh, Ted! can't you _ever_ get up?" asked Janet, almost ready to cry.

"Oh. I'll get out somehow," he said. Then dangling down from a tree behind his sister, he saw a long wild grapevine, which was almost like a piece of rope.

"If I had hold of that I could pull myself out," Teddy said. "See if you can reach it to me, Jan."

After two or three trials his sister did this. Then, holding to a loose end of the grapevine while the other end was twined fast round a tree, Teddy pulled himself out of the hole. Once on firm ground he made the loose end of the grapevine fast to a stone that lay near the edge of the hole.

"What made you do that?" asked Janet.

"So the next time I get down there I can pull myself out," Teddy answered.

"Are you going down there again?" Jan queried.

"Course I am!" declared Ted. "I didn't half look in the cave. It's a big place. I could see in only a little way, 'cause it was so dark. I'm goin' to tell grandpa and have him bring a lantern."

Grandpa Martin was surprised when Ted and Jan told him what they had found in the woods.

"I didn't suppose there was a cave on the island," said the farmer. "I must have a look at it."

"And may I come? And will you take a lantern?" asked Teddy eagerly.

"Well, yes, I guess so," said grandpa slowly.

"Oh, Father, do you think it is safe?" asked Mrs. Martin.

"Yes, I think so. I won't go very far in with the children. It may be only the den of a fox or some small animal, and not a real cave."

"I think it's a big cave," declared Ted. "Come on, Grandpa."

"Me come!" cried Trouble, as the two Curlytops set off with Grandpa Martin through the woods, toward the place where Teddy had fallen down with the pile of leaves. "Me come!"

"No, you stay with me," laughed Mother Martin, catching him up in her arms. Trouble did not want to stay behind, not having been with his brother and sister of late as much as he wished. "We'll bake a patty-cake!" Mrs. Martin added, and then Trouble laughed, for he liked to help Nora bake. That is, he thought he helped. And at least he helped to eat what Nora took out of the oven.

"Now show me where the cave is," said Grandpa Martin to Ted, as they neared the place. "But be careful not to fall into it again."

"Oh, I've got a grapevine rope so I can pull myself out," said Jan's brother. "Here it is, over this way."

Teddy Martin was an observing little fellow. He could find his way around in the woods very well, once he had been to a place, and he did not go wrong this time. He led his grandfather right to the entrance of the cave.

And it proved to be a real cave. Grandpa Martin found this out when he jumped down into the place where Teddy had fallen, and when the lantern had been lighted and flashed into the dark hole.

"Yes, it's a cave all right," the children's grandfather said. "And to think the many times I've been on this island I never found it! Well, I'll go in a little way."

"Can't I come?" asked Ted, as he saw his grandfather start into the dark hole which spread out from the open place into which Ted had fallen.

"I'm not coming," declared Janet, "and I don't want to stay here all alone."

"You stay there with your sister, Curlytop," directed Mr. Martin. "If I find out it's all right and is safe, I'll come back and take you both in a little way."

Grandpa Martin walked into the dark hole, his lantern flickering like a firefly at night. The Curlytops watched it until they could no longer see the gleam. Then they waited expectantly.

"Maybe somethin'll grab grandpa," said Jan, after a bit.

"What?" asked Ted.

"A fox--or somethin'!"

"Pooh, he isn't afraid of a fox!"

"Well, a bear, maybe!"

"There isn't any bears here, Janet Martin! I'm not afraid."

Perhaps Ted said this because, just then, he saw his grandfather coming out of the cave. The farmer had not been gone very long.

"Is it a cave?" called Ted.

"A sure-enough one?" added his sister.

"Yes, it's a sure-enough cave. But there's nothing in it."

"No wild animals?" Jan demanded.

"Not even a mouse, as far as I could see," laughed Mr. Martin. "But some one had been in the cave eating his lunch."

"Maybe there was a picnic, Grandpa," suggested Ted.

"No, I think only one or two persons were in the big hole," said his grandfather. "For it _is_ a big hole, larger than I thought it was. I could stand up straight once I was inside."

"Take us in!" begged Ted.

"Yes, I think it will be all right. Come along, Jan. I'll hold your hand, and there isn't anything of which to be afraid. Come on!"

So Janet and Teddy went into the cave. By the light of grandpa's lantern they could see that it was a large place, a regular underground house--a cave just like those of which they had read in fairy stories.