( 1 ) SIR R. N. Mukherjee was a well-known industrialist. Sir R. N. Mukherjee died having executed a will under which he appointed an executor for administration of his estate. One Rabindra Nath Mukherjee being the grandson of Sir R. N. Mukherjee was entitled to one-third share in the estate of Sir R. N. Mukherjee (deceased ). However, before the estate of Sir R. N. Mukherjee (deceased) was fully administered, Rabindra Nath Mukherjee died on September 20, 1975. Rabindra Nath Mukherjee had married one Mahamaya. The four petitioners are the four children of Mahamaya and Rabindra Nath Mukherjee. The petitioners have challenged the assessment orders in respect of the years 1968-69 to 1975-76 under the Wealth-tax Act, 1957, in which the petitioners have been sought to be assessed in respect of Rabindra Nath Mukherjee's one-third share in his grandfather's estate. According to the petitioners, their father, Rabindra, till the date of his death, had not received any portion of his grandfather's estate. Therefore, the question of the petitioners being assessed to wealth-tax in respect of their great grandfather's estate for the period prior to their father's death on Septembe