324. Exceptions and reservations.

324.     Exceptions and reservations.

It is usual in mining leases to make certain exceptions and reservations1 in favour of the lessor. These are intended either for the protection of the demised mines or the surface land and buildings on it, or for the preservation of the lessor's right to work excepted mines2. Sometimes there is an exception from the liberty to work, in which case the part of the mine so excepted remains subject to the demise3. Thus a covenant to work mines and get the minerals4 until the whole are worked,