ITS TREES 113 evil, and remind them that the careless dropping of a cigar-light, when the herbage is dry, may irreparably destroy many acres of copse, and that wrongdoers may be deterred by a word of caution or by information given to the keepers. Considerable areas of Forest land, which were wrongfully enclosed, were cleared of trees and cultivated for several years before they were again thrown open. I have dealt with the subject of planting elsewhere. Of the thousands of Londoners who refresh them- selves by a visit to our groves, comparatively few do so at the two periods of the year when they are most beautiful—early May and late October. To the tree-lover I strongly recommend the former month. It is then, when the first burst of spring takes place, that the distinguishing characteristics, and especially the colours, of each tree can be best seen. A few weeks later the yellow of the young oak foliage, the gray-green of the birches, and the burnished light-reflecting quality of the beeches are merged in one uniform dark green, lovely in its varied shapes and play of light and deep shadow, but monotonous as to colour. The blackthorn in April, the hawthorn in May, a month later the crab, and sheets of the water-violet and water- ranunculus, supply the masses of white without which no group either of flowers or trees is com- plete. Again in the " fall," when our glades are almost solitudes, who can measure the glories of the beech groves when they put on their first autumn touches of brown and gold, contrasting with the dark green of the more persistent oak, and with the saffron yellow of the birch and maple ? No leaf-colouring can be found to surpass these in brilliancy. And yet these beauties are mostly wasted on the desert air. Let me then invite the visitor to extend his migratory periods at both ends. In the following list I have described only those trees which are native to the soil. There are many others, such as the horse chestnut, Spanish chestnut, poplar, elm, walnut, sycamore,