S. 153A : Assessment-Search-No incriminating material found-Dumb document-Statement in the course of search is not incriminating document-Third party statement-Statement to be construed as a whole-Cash credits-Burden shift on the assessee only when incriminating material is found-Deletion of addition by CIT(A) is affirmed . [ S.68 , 699C ,132(4) , 143(3), 292C ]