Such connections may include the fact that my land is beside the sea or a river, that my fixed property borders on land suitable for hunting, pasture, or other uses, that stone or other mineral resources underlie my fields, that there may be treasure in or under the land which I own, and so on; or the connections may arise only in the course of time and as a result of chance, as with some so called natural accessions, such as alluvial deposits and the like or items washed ashore.