The clematis and ivy are large-foliaged plants, and their pliant stems interlace on the hedge in such a manner as most surely to kill out the quicks, and so to become the usurping tenants; but, no sooner have they attained the mastery than they begin to decay, whole branches die, and the result is a gap, which must either be patched up with thorns or be newly planted, and then fenced with post and rails. As regards mending gaps with thorns, we ought to state that we view it as decidedly injurious,—as dead matter in proximity with the living only prevents the growth of the latter: at best it is only a makeshift, which soon gets rotten, and tempts the petty wood-pilferer to pull the hedge further to pieces for the sake of a few dry sticks. With regard to those plants of which we may take the bryony and the hop as the types, it is true that their bine is annual; but each year the quantity and strength of this augments—each year the mass of foliage becomes larger and thicker. The twining arms twist around any branch strong enough to support them, and then, once at the top of the fence, they spread over its surface, making so thick a mass that the legitimate hedge-plants are no longer visible; thus sun and air are excluded from them, and they soon pine away. These are difficult to eradicate, as they have stout rhizomata (underground stems) interlaced with the very roots of the hedge-plants: still, if pains be taken to pluck away the bine as soon as it makes its appearance, it must in time be destroyed; for, like even the hawthorn tree, hardy as it is, if the leaves be kept from perfecting themselves, they soon pine away, and ultimately die altogether. The other plants are more properly weeds of the hedge-bank than of the hedge, and as such need only be mentioned with weeds in general as pests to be periodically removed by hoeing, digging, and otherwise clearing the ground between and about the hedge-row work, more particularly necessary in the first few years of planting. CHAPTER XXXVI. ON HEDGE-ROW TIMBER. Of the many sources of mischief to which the farmer may be liable, we can conceive none greater than that of being overgrown with hedge-row timber. It is scarcely, if at all, second to that of being overstocked with game—for as regards game, there is a chance of getting some compensation for palpable injury; but the mischief which trees silently but surely effect, when surrounding fields, is never allowed for, as it is not fully appreciated by the tenant, and never admitted by the landlord; and so as hedge-row timber is usually thicker in the richer parts of the country, it is somehow considered as an evidence of fertility on the one hand, while it is looked upon as a legitimate mode of increasing income on the other.