23. MAPS AND COUNTY BOUNDARIES. 1813; 1837-1838; 1840-1842; 1845;
1847-1857; 1859-1861; 1870-1871; 1873. 5 in. Letters received; reports on surveys of county boundaries for Claudius Crozet's internal improvement maps of 1838, 1848, and 1855, and Ludwig von Bucholtzs state maps of 1859; sketch maps of county boundaries, ca. 1858.

24. INTERNAL IMPROVEMENT MAP OF 1859.1859-1860. 1 in.
Letters received; accounts; proposals, bills for engraving "Astronomical Observations"; lists of counties and maps, etc.

25. MAP, MAP FRAGMENT AND DRAWING OF BRIDGE FOOTING. n.d.
1 in. "Maps showing the Chatham Extension and the Cheraw and Salisbury Projected Railroads in North and South Carolina by A.Y. Lee, Architect and Engineer, Columbia, S.C."; fragment of printed map showing boundaries of Buchanan, McDowell and Smyth counties outlined in ink; bridge footings or foundations, ink drawing, "Mountain Profile" and "Profile for beds of rivers and creeks."

26. FISH LADDERS. 1872; 1874-1881; n.d. 1 in.
An act passed April 20, 1874, made it the duty of the Board of Public Works to ensure the free passage of fish up and down the streams and rivers of Virginia. Letters received; photographs and plans of fish ladders; lists of owners of mills and dams in various counties.

27. SALT WORKS. 1862-1865; n.d. 1 ft. 3 in.
Letters received; reports; contracts; accounts; "Proceedings of the Board of Supervisors of the Production and Distribution of Salt: Act 30 March 1863," Apr 1, 1863-Jan 20, 1865.

28. SPECIAL COURT OF APPEALS, PETITION FOR REHEARING,
LERSNER VS. BOLLING, ARGUMENT OF JOHN S. MOSBY. n.d. 1 vol. 1 in. Case did not involve Board of Public Works.

29. ANNUAL REPORTS OF RAILROAD COMPANIES. 1856-1860; 1870-1872;
1876. 14 vols. 4 in. Annual reports of: Chesapeake and Ohio Railroad (1870); Manassas Gap Railroad (1858); Norfolk and Petersburg Railroad (1859; 1870); North Western Virginia Railroad (1856); Richmond and Petersburg Railroad (1857; 1870); Richmond, Fredericksburg, and Potomac Railroad (1870-1871); Seaboard and Roanoke Railroad- (1872); South Side Railroad (1871); Virginia and Tennessee Railroad (1860; 1870); Winchester and Strasburg Railroad (1876).

30. EXPERIMENTAL RAILWAY. 1849-1852. 1 in.
Letters received; receipts; accounts; contracts; bills of lading; insurance policy.

31. SECRETARY OF THE BOARD OF PUBLIC WORKS; VOUCHERS AND
ACCOUNTS. 1816-1823. 1 in. Accounts and receipts for office expenses (postage supplies, furniture, etc.); receipts for payments on contract with John Wood for county surveys (1820); letters received by Secretary.

32. ANTHONY ROBINSON, JR, COLLECTOR OF THE BOARD OF PUBLIC
WORKS. 1821-1831. 1 in. Letters sent; accounts, etc., pertaining to interest on loans due the board collected by Robinson and transmitted to the board.