"Throughout our inquiry we have to bear in mind that the following
elements are quite distinct in conception, and, though very often
found in combination, are also separable and often separated in
practice. They are
i. Physical control, detention, or de facto possession. This,
as an actual relation between a person and a thing, is
matter of fact. Nevertheless questions which the Court must
decide as matter of law arise as to the proof of the facts.
ii. Legal possession, the state of being a possessor in the eye
of the law.
This is a definite legal relation of the possessor to the
thing possessed. In its most normal and obvious form, it
coexists with the fact of physical control, and with other
facts making the exercise of that control rightful. But it
may exist either with or without detention, and either with
or without a rightful origin.
A tailor sends to J.S.'s house a coat which J.S. has
ordered. J.S. puts on the coat, and then has both physical
control and rightful possession in law.
J.S. takes off the coat and gives it to a servant to take
back to the tailor for some alterations. Now the servant
has physical control (in this connexion generally called
'custody' by our authorities) and J.S. still has the
possession in law.
While the servant is going on his errand, Z. assaults him
and robs him of the coat. Z. is not only physically master
of the coat, but, so soon as he has complete control of it,
he has possession in law, though a wrongful possession. To
see what is left to J.S. we must look to the next head.
iii. Right to possess or to have legal possession. This includes
the right to physical possession. It can exist apart from
both physical and legal possession; it is, for example, that
which remains to a rightful possessor immediately after he
has been wrongfully dispossessed. It is a normal incident
of ownership or property, and the name of 'property' is
often given to it. Unlike possession itself, it is not
necessarily exclusive. A. may have the right to possess a
thing as against B. and everyone else, while B. has at the
same time a right to possess it as against everyone except
A. So joint tenants have both single possession and a
single joint right to possess, but tenants in common have a
single possession with several rights to possess. When a
person having right to possess a thing acquires the physical
control of it, he necessarily acquires legal possession
also."