“But why so many precautions?” asked Pencroft.  “As yet we have seen no dangerous animals.  As to our island being inhabited by natives, I don’t believe it!”

“Are you quite sure of that, Pencroft?” asked the engineer, looking at the sailor.

“Of course we shall not be quite sure, till we have explored it in every direction,” replied Pencroft.

“Yes,” said Harding, “for we know only a small portion of it as yet.  But at any rate, if we have no enemies in the interior, they may come from the exterior, for parts of the Pacific are very dangerous.  We must be provided against every contingency.”

Cyrus Harding spoke wisely; and without making any further objection, Pencroft prepared to execute his orders.

The front of Granite House was then to be lighted by five windows and a door, besides a large bay window and some smaller oval ones, which would admit plenty of light to enter into the marvelous nave which was to be their chief room.  This facade, situated at a height of eighty feet above the ground, was exposed to the east, and the rising sun saluted it with its first rays.  It was found to be just at that part of the cliff which was between the projection at the mouth of the Mercy and a perpendicular line traced above the heap of rocks which formed the Chimneys.  Thus the winds from the northeast would only strike it obliquely, for it was protected by the projection.  Besides, until the window-frames were made, the engineer meant to close the openings with thick shutters, which would prevent either wind or rain from entering, and which could be concealed in need.

The first work was to make the openings.  This would have taken too long with the pickaxe alone, and it is known that Harding was an ingenious man.  He had still a quantity of nitro-glycerine at his disposal, and he employed it usefully.  By means of this explosive substance the rock was broken open at the very places chosen by the engineer.  Then, with the pickaxe and spade, the windows and doors were properly shaped, the jagged edges were smoothed off, and a few days alter the beginning of the work, Granite House was abundantly lighted by the rising sun, whose rays penetrated into its most secret recesses.  Following the plan proposed by Cyrus Harding, the space was to be divided into five compartments looking out on the sea; to the right, an entry with a door, which would meet the ladder; then a kitchen, thirty feet long; a dining-room, measuring forty feet; a sleeping-room, of equal size; and lastly, a “Visitor’s room,” petitioned for by Pencroft, and which was next to the great hall.  These rooms, or rather this suite of rooms, would not occupy all the depth of the cave.  There would be also a corridor and a storehouse, in which their tools, provisions, and stores would be kept.  All the productions of the island, the flora as well as the fauna, were to be there in the best possible state of preservation, and completely sheltered from the damp.  There was no want of space, so that each object could be methodically arranged.  Besides, the colonists had still at their disposal the little grotto above the great cavern, which was like the garret of the new dwelling.