But before I begin, perhaps it may not be impertinent to acquaint you with some things that happen'd in our Voyage. We sail'd in the Ship _Judith_, Captain _Trim_ Commander, 'twas Fly-boat built, about 200 or 250 Tuns; she sprung a considerable Leak. When the Captain had made long and diligent Search, had tried all methods that Seamen use upon such occasions, or he could think of, all in vain, and that the Leak encreased, he came pensively to consult me. Discoursing with him about it, and understanding that the Ship was Cieled within, so that though the Leak might possibly be in the fore-part, it would fill the whole Cavity betwixt the Cieling and the Planks, and so run into the Hold at all the Crevices of the Cieling up and down: I thereupon conceive, that where it burst in betwixt the Cieling and the Planks, it must needs make some Noise. He told me, they had endeavoured to find it out that way, and according to custom had clapt Cans to their Ears to hear with; but the working of the Ship, the Tackle and the Sea made such a Noise, that they could discover nothing thereby. I happily bethought my self of the Speaking Trumpet; and having one which I had contrived for some other Conveniences, of a differing shape from the common sorts, I bid him take it and apply the broad end to the side of the Ship, the narrow end to his Ear, and it would encrease his Hearing as much as it augmented the Voice the other way, and would ward the Ear too from the confusion of foreign Noise. Upon the first application, accordingly they heard it, tho' it happened to be at a considerable distance; and when they removed the Trumpet nigher, they heard it as if it had been the Current of a mighty River, even so distinctly, as to have Apprehensions of the bigness and figure of the Hole that the Water came in at; so that cutting there the Sealing of the Ship, they immediately stopt the Leak.