one Shailendra Nath Mitra (hereinafter referred to as ''original lessee'') for 30 years commencing from 29/09/1905 and said lease was due to expire on 29/09/1935. On 16/10/1935, the original lessee applied for renewal of the lease which came to be referred as Lease Renewal Case No.40/1935-36. 3. Above being the situation, the original lessee expired on 04/06/1941 leaving behind his two sons Nalininath Mitra, Jatindranath Mitra (Father of the Plaintiffs), his wife Khagendrabala Mitra and his daughter-in-law Smt. Gauribala Mitra as his legal heirs. A substitution petition came to be filed by the legal heirs of original lessee in Case No.40/1935-36 and subsequently on 22/01/1944 the lease came to be renewed and a fresh lease deed came to be executed in favour of the legal heirs of the original lessee, for a further period of 30 years with effect from date of expiry viz., 26/09/1935. The aforesaid lease agreement executed in favour of the legal heirs of the original lessee expired on