De casibus liber singularis
Gaius, Cases. Neratius speaks of a possible case where a party who could not sue to recover what he had given, on the ground that he had discharged a debt, is still not released; for example, where he was obliged to deliver a certain slave, and gives one who was to be free under a certain condition; for, in this instance he is not released because he does not make the said slave the absolute property of the stipulator; still, he cannot recover him because he was paying a debt.
Gaius, On Cases. Where a testator, who is insolvent, happens to have an heir in addition to a slave who has been appointed his heir with the grant of his freedom, for instance, where the testator in appointing the slave his heir with the grant of his freedom added: “If Stichus should be my heir, then let Titius also be my heir”; for Titius cannot be the heir before Stichus becomes such under the will, and as the slave has at once become the heir, he who was added cannot share in the estate; so that where the slave becomes the heir, the other ceases to be one.
Gaius, On Events. It sometimes happens that a legacy bequeathed conditionally may be understood to be absolute; as where something is left dependent upon the same condition under which another heir was also appointed. The same rule applies where a bequest is left under the condition that the heir enters upon the estate. On the other hand, where a legacy is bequeathed absolutely, it may be held to have been conditional; as, for example, where the property bequeathed is taken away under a condition, because it is understood to have been left under an opposite condition.
Gaius, On Special Cases. It is well established that even if the son of a patroness is under parental control, the estate will still belong to him by law.
Gaius, On Cases. A freedman who has two patrons can, in some instances, perform different services for both of them, at the same time; as, for example, if he is a copyist, and works for one of his patrons by writing books, and takes charge of the house of the other while the latter is on a journey with his family; for nothing will prevent him from writing books while he is in charge of the house. Neratius stated the same opinion in his Works of Parchments.
Gaius, On Special Cases. If it is stated in a will, “I give Stichus to Titius, in order that he may manumit him, and if he does not do so, let him be free,” Stichus will immediately become free.