Very different from this is the drive too often adopted which is an open drive, so wide that it never goes near the trees, and which admits such a current of air, that the front trees are generally the worst in the plantation [fig. 233]. Add to this, that two narrow slips of plantation will neither grow so well, nor be such effectual harbours for game, as deeper masses; especially where the game is liable to be disturbed by a drive betwixt them. The belt may be useful as a screen; but, unless very deep, it should never be used as a drive; at least till after the trees have acquired their growth, when a drive may be cut through the wood to advantage [see fig. 233].