But as neither craft was insured, it was necessary to use extraordinary precautions! A working party of half a dozen was detailed from each boat, consisting of the stoutest boys, who were landed upon the island.

Materials were immediately gathered and the foundation laid.

The structure was to be a simple round tower, as high as the patience of the workmen would permit them to build it.
In a short time all the rocks on the island had been used up, and the lighthouse was only two feet high; but this contingency had been anticipated, and provisions made for supplying more stone.

A large rock was attached to the long painter of the Butterfly, and she was moored at a safe distance from the island, while her remaining crew were transferred to the Zephyr.
A rude raft, which had been provided by Tony, was towed to the shore, where an abundance of rocks were to be had.

It was their intention to load it with "lighthouse material," and tow it to the island.