Clause 11 stipulates that at the first instance the period of lease was made 10 years and in case the Lessee acted in accordance with what was expect ed of him under clause 9, the period of the lease 411 would be extended for a further period of 5 years upto 31st March, 1961 at enhanced rent of Rs.250 per month, and if the Lessee continued to act in accordance with what was expected of him under clause 9 during this period of 5 years the period of the lease would be extended for a further period of 5 years, that is, upto 31st March, 1966 at a monthly rent of Rs.300 and in case the Lessee continued to act during this period as expected of him under clause 9 till the end of the period of 20 years he would be entitled by serving a notice to obtain an extension for a further maximum period of one year at enhanced rent of Rs.500 per month.