lease dated July 31, 1927 (hereinafter referred to as the 'head lease '), Raja Bishambharnath Sahi (hereinafter referred to as the 'Raja ') who was the sole proprietor of large tracts of land known as the Sonepura estate in Paragana Rohtas in the district of Shahbad in Bihar demised certain blocks of land situate in villages Jaintipur, Nimhath Deodand and Dhanwanti, District Shahbad together with quarries of lime stone (known as Chunhatta Lime Stone Quarries) lying thereunder for a period of 40 years commencing from 1st day of August, 1927, and ending on 31st day of July, 1967, with an option to continue for a further period of 25 years, in consideration of a 'salami and fine ' of Rs. 8,200/ unto Karunaranjan Dutt and Jugal chandra Dutt (hereinafter referred to as 'Dutts ').