In June 1968, demands were made by the District Mining Officer, appellant No. 2 herein, for payment of royalty at the rate specified in the Mineral Concession Rules, 1949 in respect of the period commencing from November 3, 1951 the date of vesting of the estates of the head lessors under the Bihar Land Reforms Act till May 31, 1958 and in respect of the period from June 1, 1958 the date of coming into force of the 1957 Act to December 12, 1965, at the rate C. J.C. 653of 1965 (Patna H.C.) 167 specified in the Second Schedule to the 1957 Act, after setting off 211/2% already realised, in view of the decision in Narendra Nath Mandal 's case (supra).