The folder contains documentation and statistics compiled by the Humber Conservancy Board, and others, in order to make a case against the proposed Humber Bridge. This includes:

1. List of various vessels of over 10,000 gross tonnage coming up to Salt End Jetty and King George Dock, Hull, from 1 April 1930 to 31 March 1931

2. Particulars of Humber Bridge Proposals

3. Statement shewing values of total imports and exports (31 January 1931).

4. Number and net register tonnage of vessel that arrived and departed with cargoes and in ballast during the year 1929 (31 January 1931)

5. Statement shewing estimated number of vessels which navigated over site of bridge during 1930 (31 March 1931)

6. The Goole Steamship Owners' Association: Statement shewing owners, number of vessels, tonnage, cargo carried in year 1930, and number of times vessels passed the site of proposed bridge in 1930

7. Statement shewing number of vessels observed by crew of Upper Whitton Lightship to have passed the Lightship (in the Upper Humber) during six months—1 May to 31 October 1930

8. Statement shewing number of sloops and keels sailing under their own canvas, observed and recorded on Upper Humber Lightships. From 1 February to 30 September 1931

9. Comparative statement shewing number and net register tonnage of vessels that arrived and departed with cargoes and in ballast during 1929

10. Statement of London barges and sailing vessels (other than London barges) which passed over site of proposed Humber Bridge during year ended 31 December 1930

11. Models of Tidal Estuaries

12. Engineer's Inspections and Conference etc (15 April 1931)

13. Details of information supplied to Mr Reed

14. Comparison with River Severn Bridge

15. Extract from Mr Rhodes letter regarding River Severn Bridge—manuscript and typescript copies (16 January 1931)

16. Average of three years Humber tidal observations at Hessle (21 January 1931)

17. Memorandum regarding Tay Bridge Bill (6 March 1931)

18. Movements of Hessle Sand Light Float (1911 to 1930)

19. Movements of three-fathom contour off Hessle relative to site of proposed Humber Bridge (1861 to 1930)