This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
Sweep them up when dry. Keep the Oak leaves by themselves if you can; for they don't make such good leaf-mould as others. Burn Fir leaves. Keep the leaves as dry as you can by packing them close in dry weather against your pits, if you want the leaves to keep frost out; and put over them a sloping roof of mate or old boards, or something of that kind. So managed, they will keep off very bad cold. If they get very wet they are not of much use. If you don't want them for pits, put them into a shed. You may get some early Seakale or Rhubarb by burying the old roots among dry leaves. When the winter is over and you want a little bottom-heat for your frames, leaves are useful for mixing with stable litter. Half and half is not too much. A Cucumber bed made up so will give a nice mild heat. What leaves you don't want for this should be thrown up out of doors for the summer, to take their chance, and by the autumn all except the Oak leaves will be crumbled to powder, and make famous leaf-mould. But they should be turned over two or three times during the summer.