Section, R.S. 3743; Feb. 27, 1877, ch. 69, 19 Stat. 249; July 31, 1894, ch. 174, 18, 28 Stat. 210; June 10, 1921, ch. 18, title III, 304, 42 Stat. 24, provided for deposit of all contracts which required advance money or settlement of public accounts in the General Accounting Office.