it the test is, as stated by Crompton J.,in Sadler v. Henlock
, quoted with approval by Bowen LJ., in Donovan v. Laing,
rton, and Down Construction Syndicate (2), whether the
sought to be made responsible retained the power of con-
trolling the act. Now, the powers of a constable, qud peace
cer, whether conferred by common or statute law, are exercised
by him by virtue of his office, and cannot be exercised on the
F onsibility of any person but himself. If he arrests on sus-
ion of felony, the suspicion must be his suspicion, and must be
mable to him. If he arrests in a case in which the arrest
be made on view, the view must be his view, not that of
omeone else. Moreover, his powers being conferred by law, they
ire definite and limited, and there can be no suggestion of holding
m out as a person possessed of greater authority than the law
confers upon him. I am disposed to think that this is a sounder
basis for the rule of the immunity of those who appoint constables
their acts than that suggested by Wills J. A constable, there-
e, when acting as a peace officer, is not exercising a delegated
uthority, but an original authority, and the general law of agency
no application.
'The authority of the master of a ship at sea to maintain order
analogous. He derives his authority from his office, to which
'appointed by the owners of the ship. But the authority
hich he exercises in this respect is, I conceive, an original and
onal, and not a delegated, authority. And I do not know of
ny instance in which it has been sought to hold the owners
onsible for an excess by the master, though there are several
ed cases of actions against masters.
_ It has always been assumed that the common law, so far as it