606. When one period of redemption is fixed.

The rights of redemption of successive mortgagees1 are not always preserved. The mortgagor himself is not entitled to any further period for redemption beyond the ordinary six months because he has incumbered the equity of redemption2. When questions of priority arise between incumbrancers which do not affect the claimant, these need not be determined in his presence, and therefore, to avoid doing so, only one period of redemption is fixed for all the incumbrancers and the mortgagor, and the order is made without prejudice to the priority of the incumbrancers among themselves3. Similarly, where they, or some of them,