De tacitis fideicommissis liber singularis
The Same, On Implied Trusts. He to whom a secret trust has been left, having given information that he had no right to receive it, the question arose whether, according to the privilege of the Divine Trajan, he was entitled to three-fourths of the amount of the trust, or only half of it. A Rescript of the Emperor Antoninus on this point is extant as follows: “The Emperor Antoninus to Julius Rufus. If he who has secretly pledged his faith to deliver an estate to someone not legally qualified to receive it should deliver it after having deducted the fourth part of the same, he cannot retain anything; for the fourth belonging to the heir himself will be taken from him and transferred to the Treasury. Wherefore, the person who gave the information can only receive the half of three-fourths.”
The Same, On Implied Trusts. We should understand by the expression “matters transacted or completed,” not only such as are in dispute, but also those with reference to which no controversy exists.