(g) In consideration of the rent hereinafter reserved and the covenants by the Lessee hereinafter contained the Lessee and the Lessors both hereby lease unto the Lessee all that piece or parcel of land including any buildings constructed therein defined as the Property more particularly described in [1] and [2] (which shall form an integral part of this Lease) together with all rights, easements and appurtenances thereto except all mines, mineral products, coal, petroleum and other natural resources as well as buried treasure occurring under or within the said land if any are discovered.