has placed reliance on another maxim frustra legis auxilium invocat quaerit qui in legem committit. He relies on Perry v. Fitzhowe [(1846) 8 QB 757 : 15 LJ QB 239] . At p. 192, it is stated that if a man be bound to appear on a certain day, and before that day the obligee puts him in prison, the bond is void. At p. 193, it is stated that “it is moreover a sound principle that he who prevents a thing from being done shall not avail himself of the non-performance he has occasioned”. At p. 195, it is further stated that “a wrong doer ought not to be permitted to make a profit out of his own wrong”. At p. 199 it is observed that “the rule applies to the extent of undoing the advantage gained where that can be done and not to the extent of taking away a right previously possessed”. 19. It is beyond cavil of doubt that no one can be permitted to take undue and unfair advantage of his own wrong to gain favourable interpretation of law. It is a sound principle that he who prevents a thing