EQUITY AND TRUSTS — Estoppel — Conditions for Estoppel by Conduct

"If a man by his words or conduct wilfully endeavours to cause another to believe in a certain state of things which the first knows to be false and if the second believes in such state of things and acts upon the belief, he who knowingly made the false statement is estopped from averring afterwards that such a state of things does not exist at the time, again. If a man either in express terms or by conduct, makes representation to another of the existence of a state of facts which he intends to be acted upon in a certain way, in the belief of the existence of such a state of facts, to the damage of him who so believed and acts, the first is estopped from denying the existence of such a state of facts. Thirdly, if a man whatever his real meaning may be, so conducts himself that a reasonable man would take his conduct to mean a certain representation of facts and that it was a true representation, and the latter was intended to act upon it in a particular way, and he with such belief, does act in that way to his damage, the first is estopped from denying the facts as represented."