685. Intention as to merger inferred from indications occurring subsequent to union.

Where the union of the interests takes place otherwise than by the intended acquisition of the charge or estate, or payment off of the charge, so that no indications of intention can exist at the time of union, it is permissible to rely on any such indications occurring subsequently during the life of the owner1, but apparently not on expressions of intention previous to the union of the interests2. Merger will be prevented by any acts done by the owner which are only consistent with the charge being kept on foot3. Similarly, merger will be effected where the owner