Legal maxim and Latin for equity looks upon that as done which ought to have been done. The doctrine of satisfaction well illustrates this principle of law. Where a person is under an obIigation to perform an act, equity looks on it as done, and allows the same results to follow as if it were actually done. Thus, when one who has contracted to sell realty dies, the purchase money therefor forms part of his estate, and goes to his next of kin, if intestate, such realty being deemed in equity to be vested in the contractee.