There have so far been four accessions, of varied material, as described below. The accessions cover pieces 1-494, 495-952, 953-956 and 957-967.
In each of the four accessions the records are listed alphabetically under old counties, which were relevant at the time they were created.
Usually in the date field of the online list the dates of original documents or the dates when copies were made are given. Sometimes, however, the date of copying has been impossible to discover. In that case the date of the deed copied has been given in square brackets.
The former reference gives the number of the Board of Trade Solicitors' box in which the papers were previously housed.
BT 297/494 contains sheets, numbered under the former reference numbers, indexing the important papers in each case. The marginal file references on these sheets do not indicate that these files are extant - they are given as a possible guide to a chain of events. BT 297/494 is a much more detailed catalogue of the contents of the Solicitors' boxes than the online list, but it does not give the piece numbers and is arranged by box number, not county.
Pieces 495-952; 953-956 and 957-967:
It was the practice of the Board of Trade and other government departments involved to register each action in a separate file using an individual number plus the year as reference, and these files were added to earlier files on the same subject to form a 'bundle', which was finally indexed under the top number. This top number is that shown in the former reference field of the list.
For example, BT 297/846 consists of fourteen files, as follows: M 7467/1949, M 11549/1932, M 13739/1931, M 8965/1931, M 13445/1929, M 8008/1929, M 13247/1927, M 13788/1914, H 13653/1914, H 11366/1914, H 8621/1914, H 13603/1913, H 7698/1913, H 6127/1913. This was indexed as 7467/49.
The files originated from these departments:
H series: Board of Trade Harbour and Lighthouses etc. Department (1866-1867); Harbour Department (1867-1898); Fisheries and Harbour Department (1902-1904); Harbour Department (1904-1918); and Public Utilities and Harbour Department (1918-1919)
F and H series: Board of Trade Fisheries and Harbour Department (1898-1902)
M series: Board of Trade Marine Department (1919-1926) and Mercantile Marine Department (1926-1939); Ministry of Shipping Mercantile Marine Department (1939-1940) and Marine Division (1941); Ministry of Transport Marine Division (1947-1949)
PT/H series: Ministry of War Transport Port and Transit Control (1943-1946); Ministry of Transport Port and Transit Control (1946-1948)
PT/M series: Ministry of War Transport Marine Division (1941-1942)
S series: Board of Trade Fisheries Department (1896-1898, dealing with wreck)
DENBIGHSHIRE: 1882-1907 River Conway: Attorney General v Conway Corporation See BT 297/17-19 58
MONMOUTHSHIRE River Wye: Duke of Beaufort See BT 297/155