It is important to remember that, in many parts of an estate, as the shade trees become lofty the sun will come in, just as it would on a man's head if he carried his umbrella erect, and at the end of a long pole, and I have seen coffee trees so much exposed to the sun as to require fresh shade to be planted near them, not withstanding that some of the coffee trees in question were almost touching the stem of a very tall shade tree. When the planter observes that the sun is thus likely to come in from the shooting up of the shade trees, he should plant fresh shade. Nor need he be afraid of putting down too much, for it is easily removed if this is done when the trees are small, and then it must also be remembered that, as the plantation ages, both coffee and soil call for more shade, as the growing power of the land, and its ability to keep the trees fresh and green, naturally diminishes with the advance of time. Whenever, then, the appearance of the coffee shows that it is needed, fresh shade should be at once supplied, for every yellow leaved patch of coffee in a plantation is a breeding ground for the Borer insects, which will gradually spread into the adjacent coffee, where their presence will never be detected till hot, dry seasons occur, which they are sure to do sooner or later. When spreading from such yellow patches the Borer insect may not attack strong trees. On the contrary, it will generally attack those which are in a dried up condition either from weakness of constitution or because they are suffering from the effects of an over heavy crop, but in such trees it will surely obtain a footing, and so be ready to spread further when hot, dry seasons arrive. When, then, the appearance of the coffee shows that more shade is required, charcoal trees should be planted, and on the northern side of them cuttings of the good caste shade trees should be put down; and I particularly emphasize the side for the nurse because it is thus interposed between the sun and the permanent shade trees to be sheltered.