S. 147 : Reassessment-After the expiry of four years-No failure to disclose material facts-The four-year period not from the disposal of appeal by CIT (A)-Third proviso-Reassessment is held to be not valid-Reassessment was held to be not valid-Appeal-Consistence view taken in favour of assessee-Appeal is not maintainable. [S. 148, 260A]