Improving the soil

In our garden, there is a two-seater, brick-built privy. It hasn’t been used for 40 years or so, but its presence in the garden still has a direct influence on my gardening. Not only does the present paved path follow the direction of the original rough concrete one which led from house to privy but, more importantly, the soil in the borders close by is freer draining and more friable than that to be found anywhere else in the garden.