By this term is understood in general, every separation, natural or artificial, which marks the confines or line of division of two contiguous estates. Boundary also signifies stones or other materials inserted in the earth on the confines of two estates.
Boundaries are either natural or artificial.
A river or other stream is a natural boundary and in that case the centre of the stream is the line. An artificial boundary is one made by man. When a boundary, fixed and by mutual consent, has been permitted to stand for twenty-one years, it cannot afterwards be disturbed. Boundaries are frequently marked by partition fences, ditches, hedges, trees, etc. When the boundary is a hedge and a single ditch, it is presumed to belong to him on whose side the hedge is, because he who dug the ditch is presumed to have thrown the earth upon his own land, which was alone lawful to do, and that the hedge was planted, as is usual, on the top of the bank thus raised.