We must set about it regularly.

We are tired, cold, and hungry; therefore we must have shelter, fire, and food.

There is wood in the forest, and eggs in nests; we have only to find a house." "Very well," returned Herbert, "I will look for a cave among the rocks, and I shall be sure to discover some hole into which we can creep." "All right," said Pencroft; "go on, my boy." They both walked to the foot of the enormous wall over the beach, far from which the tide had now retreated; but instead of going towards the north, they went southward.

Pencroft had remarked, several hundred feet from the place at which they landed, a narrow cutting, out of which he thought a river or stream might issue.

Now, on the one hand it was important to settle themselves in the neighborhood of a good stream of water, and on the other it was possible that the current had thrown Cyrus Harding on the shore there.
The cliff, as has been said, rose to a height of three hundred feet, but the mass was unbroken throughout, and even at its base, scarcely washed by the sea, it did not offer the smallest fissure which would serve as a dwelling.