588. The custom of tin bounding.

The ownership of a mine1 is vested prima facie in the owner of the freehold2. This right of ownership is, however, modified by the custom of tin bounding. The custom has fallen into disuse, but it has never been abrogated. Under the custom, if a tin mine3 lay within waste land or certain inclosed land4 and was not worked by the surface owner, a tinner