“It signifies an appropriate degree of physical control. It must be a single and [exclusive] possession…Thus an owner of land and a person intruding on that land without his consent cannot both be in possession of the land at the same time. The question what acts constitute a sufficient degree of exclusive physical control must depend on the circumstances, in particular the nature of the land and the manner in which land of that nature is commonly used or enjoyed …Everything must depend on the particular circumstances, but broadly, I think what must be shown as constituting factual possession is that the alleged possessor has been dealing with the land in question as an occupying owner might have been expected to deal with it and that no one else has done so.”
“There is thus ample authority for the proposition that acts on one part of an area may be treated as constituting possession of the whole area provided that there is “such a common character of locality as would raise a reasonable inference” that, if a person were possessed of one part of it as owner then he would so possess the whole of it.”