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.