884 Addressing ourselves to that Question, it is clear on a construction of the document Ex I that it was a lease of the demised premises for a term of 20 years certain, on payment of Rs. 350/ annua rent in advance, even though the lessee may not continue to occupy the demised land; that the lessee had been granted a right to continue the lease of the demised premises as long as the lessee desired to do so ; that on his choosing to continue to enjoy the leasehold, the lessee was obliged to pay annually the enhanced rent of Rs. 400/ for the next ten years after October 1, 1934, and after the expiration of the ten years aforesaid, the rent was further enhanced to the sum of Rs. 500/ per annum ; that the lessee was given the option to give up the lease at any time after October 1, 1934, without any further liability for payment of the stipulated rent ; that (and this is a very important stipulation) the lessor bound himself not to call upon the lessee at any time to give up possession of the ease hold as long as the lessee was prepared to observe the terms of the lease, that the lessee was fully authorised "to erect, as many buildings, godowns, factories, bungalows and other structures etc. " as also to pull down and re erect structures or to make any altera tions, as desired by him ; that the lessor undertook not to raise any objection to the lessee making those structures or his using or enjoying the land in any way or for any purposes according to his desire; that the lessor undertook to pay the annual assessment to Government in respect of the demised premises but the lessee was obliged to pay all fines and other taxes which Government might impose for granting permission to convert the culturable land into land meant for building factories and other structures as contemplated between the parties, that if the lessee chose to give up possession of the demised premises, he shall be entitled ' to take away all machinery, iron and steel, wood works etc.