170 S.E. 726 CITY OF ROANOKE v. C. R. WILLIAMS 36617Supreme Court of Virginia. September 21, 1933 Present, Campbell, C.J., and Holt, Epes, Hudgins and Browning, JJ. 1. TAXATION — Assessment — Proceeding to Correct Erroneous Assessment — Valuation or Estimates of Witnesses as to Value of Property — Mathematical Exactness an Impossible Standard — […]