Single things can be left in trust as well as inheritances; land, for instance, slaves, clothing, gold, silver, and coined money; and the trust may be imposed either on an heir or on a legatee, although a legatee cannot be charged with a legacy.

1 Not only the testator's property, but that of an heir, or legatee, or person already benefited by a trust, or any one else may be given by a trust. Thus a legatee, or a person in whose favour the testator has already created a trust, may be asked to transfer either a thing left to him, or any other thing belonging to himself or a stranger, provided always that he is not charged with a trust to transfer more than he takes by the will, for in respect of such excess the trust would be void. When a person is charged by a trust to transfer a thing belonging to some one else, he must either purchase and deliver it, or pay its value.

2 Liberty can be left to a slave by a trust charging an heir, legatee, or other person already benefited by a trust of the testator's, with his manumission, and it makes no difference whether the slave is the property of the testator, of the heir, of the legatee or of a stranger: for a stranger's slave must be purchased and manumitted; and on his master's refusal to sell (which refusal is allowable only if the master has taken nothing under the will) the trust to enfranchise the slave is not extinguished, as though its execution had become impossible, but its execution is merely postponed; because it may become possible to free him at some future time, whenever an opportunity of purchasing him presents itself. A trust of manumission makes the slave the freedman, not of the testator, though he may have been his owner, but of the manumitter, whereas a direct bequest of liberty makes a slave the freedman of the testator, whence too he is called 'orcinus.' But a direct bequest of liberty can be made only to a slave who belongs to the testator both at the time of making his will and at that of his decease; and by a direct bequest of liberty is to be understood the case where the testator desires him to become free in virtue, as it were, of his own testament alone, and so does not ask some one else to manumit him.

3 The words most commonly used to create a trust are I beg, I. request, I wish, I commission, I trust to your good faith; and they are just as binding when used separately as when united.