2. Restraint is lawful and unlawful. It is lawful when its object is to prevent the violation of the law, or the rights of others. It is unlawful when it is used to prevent others from doing a lawful act; for example, when one binds himself not to trade generally; but an agreement not to trade in a particular place is lawful. A legacy given in restraint of marriage, or on condition that the legatee shall not marry, is good, and the condition alone is void. The Roman civil law agrees with ours in this respect; a legacy given on condition that the legatee shall not marry is void. Clef des Lois Rom. mot Passion. See Condition; Limitation.