Christopher Columbus Langdell,
Harvard Law Review
“ It is often said that time is not of the essence of a contract in equity, as if equity differed from law in that respect; but that is a mistake. Whatever is of the essence of a contract at law is of its essence in equity also. It would be strange if it were not so, since the question is entirely one of construction, and the construction of a contract ought to be the same in all courts. The real difference between equity and law is the one already adverted to; namely, that at law it is not material whether a breach goes to the essence or not, unless there has been part-performance. ”
