The legal principle applicable to the assessment of the value of
land compulsorily acquired was settled in 1907 in Spencer v. The
Commonwealth (1). I quote a passage from my own judgment,
because I cannot better express my view. I there said : - "Its
value is fixed by Statute as on that day. Prosperity unexpected,
or depression which no man would ever have anticipated, if
happening after the date named, must be alike disregarded. The
facts existing on Ist January 1905" (here Ist January 1911) "are
the only relevant facts, and the all important fact on that day
is the opinion regarding the fair price of the land, which a
hypothetical prudent purchaser would entertain, if he desired to
purchase it for the most advantageous purpose for which it was
adapted. The plaintiff is to be compensated ; therefore he is to
receive the money equivalent to the loss he has sustained by
deprivation of his land, and that loss, apart from special damage
not here claimed, cannot exceed what such a prudent purchaser
would be prepared to give him. To arrive at the value of the
land at that date, we have, as I conceive, to suppose it sold then,
not by means of a forced sale, but by voluntary bargaining
between the plaintiff and a purchaser, willing to trade, but
neither of them so anxious to do so that he would overlook any
ordinary business consideration. We must further suppose both
to be perfectly acquainted with the land, and cognizant of
all circumstances which might affect its value, either advan-
tageously or prejudicially, including its situation, character,
quality, proximity to conveniences or inconveniences, its sur-
rounding features, the then present demand for land, and the
likelihood, as then appearing to persons best capable of forming
an opinion, of a rise or fall for what reason soever in the amount