Once or twice its service was most effective, as when a fishing boat, with gunwale under water, rushed into the harbour, able, by the guidance of the sheltering light, to avoid the danger of dashing against the piers.
As each boat achieved the safety of the port there was a shout of joy from the mass of people on the shore, a shout which for a moment seemed to cleave the gale and was then swept away in its rush.
Before long the searchlight discovered some distance away a schooner with all sails set, apparently the same vessel which had been noticed earlier in the evening.

The wind had by this time backed to the east, and there was a shudder amongst the watchers on the cliff as they realized the terrible danger in which she now was.
Between her and the port lay the great flat reef on which so many good ships have from time to time suffered, and, with the wind blowing from its present quarter, it would be quite impossible that she should fetch the entrance of the harbour.
It was now nearly the hour of high tide, but the waves were so great that in their troughs the shallows of the shore were almost visible, and the schooner, with all sails set, was rushing with such speed that, in the words of one old salt, "she must fetch up somewhere, if it was only in hell".

Then came another rush of sea-fog, greater than any hitherto, a mass of dank mist, which seemed to close on all things like a gray pall, and left available to men only the organ of hearing, for the roar of the tempest, and the crash of the thunder, and the booming of the mighty billows came through the damp oblivion even louder than before.

The rays of the searchlight were kept fixed on the harbour mouth across the East Pier, where the shock was expected, and men waited breathless.
The wind suddenly shifted to the northeast, and the remnant of the sea fog melted in the blast.

And then, mirabile dictu, between the piers, leaping from wave to wave as it rushed at headlong speed, swept the strange schooner before the blast, with all sail set, and gained the safety of the harbour.