318. Rebuttable presumptions.

An artificial boundary structure belongs to the owner of the land on which it exists, but very often it is difficult to determine precisely where the boundary lies and hence to whom the feature belongs. If, on their true construction1 with such extrinsic evidence as is admissible2, the title deeds do not clearly fix the position of the boundary of land in relation to certain boundary features, resort may be had to well-established legal presumptions which apply in relation to those features and which assist the inferences which may be drawn from them