...equivalent to It. The donor must part, not only with the possession, but with the dominion of the property. If the thing given be a chose In action, the law requires...Instrument, and the transfer must be actually executed. Therefore, where a donor expressed by letter his Intention of relinquishing his share of an estate,...

...... It must be the true and effectual way of obtaining the command and dominion of the subject. ... If the thing given be a chose in action the law requires...instrument, and the transfer must be actually executed.' The Civil Code declares that 'a verbal gift is not valid, unless the means of obtaining possession...