S. 263 : Commissioner-Revision of orders prejudicial to revenue-Accumulation of income-Corpus donation-Issue dealt in revision proceedings was unrelated in character from issue of corpus donation received by assessee which was dealt in re-assessment proceedings-Revision order was beyond period of two years-order is barred by limitation-Revision is quashed and set aside.[S. 11, 12A 143(1), 147, 148]