I have been very busy here hollowing out new rockeries and digging deep holes, eight to twelve feet deep, and throwing up the sandy earth on either side, so making slopes and mounds of earth. Small narrow paths lead into these hollows, and instead of catching the water at the bottom, as I did before, I keep the bottom dry, and sink petroleum barrels level with the ground to catch the water as it runs down the paths when rain falls, or after watering with a hose. In the tall walls of sandy earth every sort of aspect is to be found, little hollows are made, and all kinds of treasures can be planted on the flat or the slope. By making holes in the sandy walls, and helping to fix the plants with a mixture of cow-dung and clay, they adhere quite well on the steep slope. On one side of these sunk rockeries, so as still more to keep off the north-east wind, there is a wall about four feet in width and four feet high, built up gradually with pieces of stone and earth between them - no mortar. This makes an excellent cool depth of soil for many precious plants. A small boggy bed can be made, by guiding the rain as it runs away into a hole, anywhere by the sides of paths and where the earth slopes. This immensely increases the effect of rainfall for individual plants, and it is a great help to gardening on sandy soils. The fault of my rockery, unavoidable from the situation, is that it has very little eastern aspect, being shaded in that direction by trees; and morning sun is what early Alpines require. As the holes approach the large trees, the banks are planted with Ferns, various Ivies, Periwinkles (Vinca), and shade-loving plants. Pernettyas, which are lovely little shrubs, will not do in sun at all; but in shade they seem to do excellently, and are quite healthy in sandy soil. All those I planted in full sun have simply died this dry year, having been very much parched up. Cotoneaster microphylla, on the contrary, never berries so well or is so satisfactory as in a very dry place fully exposed to the southern sun.

The other day as I was working in this new Alpine garden a caterpillar fell off a tree just in front of me. His head was round; he had a hairy body, plump and thickest in the middle, covered with moderately abundant hairs; and four square-topped bunches of hair of a pale yellow colour grew on his back. His head and body were green; his long, pointed tail bright pink. The spaces between the tufts of hair were deep black. His legs and pro-legs were green. I thought I had got hold of some wonderful rare beast, as I had never before found a caterpillar with a pink tail like a horn. A friend to whom I refer all my natural history questions informed me that this was the caterpillar of a moth called the 'Pale Tussock' because of the tussocks upon his body. The moth is pale gray coloured, with various markings, and is fairly common. He feeds upon most trees, often on Oak, but also on Hazel, Birch, and - oddly enough - Hops. He will eat Plum and Pear.