The stone which makes the blade of their adzes is a kind of Basaltes, of a blackish or grey colour, not very hard, but of considerable toughness: they are formed of different sizes; some, that are intended for felling, weigh from six to eight pounds; others, that are used for carving, not more than so many ounces; but it is necessary to sharpen both almost every minute; for which purpose, a stone and a cocoa-nut shell full of water are always at hand. Their greatest exploit, to which these tools are less equal than to any other, is felling a tree: this requires many hands, and the constant labour of several days. When it is down, they split it, with the grain, into planks from three to four inches thick, the whole length and breadth of the tree, many of which are eight feet in the girt, and forty to the branches, and nearly of the same thickness throughout. The tree generally used is, in their language, called _Avie_, the stem of which is tall and straight; though some of the smaller boats are made of the bread-fruit tree, which is a light spongy wood, and easily wrought. They smooth the plank very expeditiously and dexterously with their adzes, and can take off a thin coat from a whole plank without missing a stroke. As they have not the art of warping a plank, every part of the canoe, whether hollow or flat, is shaped by hand. The canoes, or boats, which are used by the inhabitants of this and the neighbouring islands, may be divided into two general classes; one of which they call _Ivahahs_, the other _Pahies_.