Srarke J. The argument for the appeliant was rested upon the
proposition that any transaction is unlawful in which the personal
or private interest of one of the parties to the transaction conflict,
or tends to conflict, with the due performance of any publie duty,
Apart from authority I should have felt considerable difficulty in
assenting to so far reaching a proposition, But Wilkinson v.
Osborne (1) and Horne v. Barber (2) in this Court establish,
it is said, the proposition contended for. There are expressions in
the judgments in Wilkinson v. Osborne that favour the contention,
but the case was decided on a much narrower and safer ground,
namely, that the contract there involved was one to exert polite
influence or pressure upon thé Government. Horne v. Borbr
might have been decided on the same ground, namely, that the
contract was one to exert political influence upon a Minister of the
Crown or the Closer Settlement Board (see p. 498), or even on
the ground that the position of the agent was such that political
influence or pressure must necessarily be exerted in dealing with
the Minister or the Board - that the agent could not effectively
divest himself of the influence and pressure attaching to his position
and made no attempt to do so (see p. 499). However this
may be, I am satisfied that the learned Chief Justice is right
in saying that the case was decided upon a broader principle
namely, that the contract was unlawful because the personal of
private interest of the agent conflicted or tended to conflict with
the due performance of his public duty. 'Thus, at _p. 499, the
Chief Justice said: "It" (thats, the agreement) " had
'tendency to interfere with the proper discharge of the duties of
Deany as a member of Parliament, and was consequently oppose
to the public good" ; and, at p.'500, "the decision of Mann J,
() 2 CLR, 89, (2) STOR, 496