"I wish I had!" said Dorothy.

"All right; you may change places with me. I'll hand over the whole set of brothers and sisters, Percy and Eric included."

"A happy exchange for us!" murmured Percy, with a look at Dorothy.

"You horrid boy!" said Gabrielle.

"I want to know why Percy has brought that coil of rope with him," enquired Dorothy. "I've been wondering ever since we started."

"Well, I'm quite prepared to satisfy your curiosity. Let us sit down and eat our lunch while I expound; there are some jolly stones here for seats."

All four were very ready for lunch, though it was only twelve o'clock. The keen air had given them fine appetites, and the ham sandwiches and chicken drumsticks disappeared quickly, not to speak of the bread and cheese and cakes.

"They don't put up bad lunches at the Hydro.," said Percy, aiming his last chicken bone at a bird that flew overhead.

"What about the rope?" asked Dorothy again. "I'm still inquisitive."

"It's an idea of mine. You know, everybody goes to Lingham Cave; it's a regular show place. You pay your shilling, and you're taken round by a guide who tells you where to step, and not to knock your head, and all that kind of stuff, and prates away about geology and natural curiosities and the rest of it, as if he'd learnt it off like a lesson. Well, instead of going where everybody else goes, I think it would be much better fun to explore a place of our own. There's another cave at the other side of Lingham, on the spur of Whernscar. I saw the entrance to it last Friday, when I walked over with Dr. Shaw. He pointed it out to me, and said very few people had been down it, but it was quite as fine as the other, and had splendid—what do you call those thingumgigs?—oh yes, stalactites, and an underground waterfall."