 Complete the following phrase:  Raja Chandra Narayan Dev succeeded his elder brother, Raja Amrit Narayan Dev as the ruler of Beltola. Raja Chandra Narayan Dev was not only an efficient ruler but also a shrewd businessman. His business of selling elephants earned him lot of profits. For business purpose he had to visit Calcutta frequently. Therefore, for his convenience in staying there, he constructed a mansion, which was known as Beltola House. He was also active in social activities and in the act of charity. The 