This section of the Anti-Slavery Papers contains the twentieth century letters of the British and Foreign Anti-Slavery Society up to 1909 and the letters from 1909 of the amalgamated societies; they fall into three main divisions:

Division 1 (D1-D2)

D1-D2 are the letters sent by and to Travers Buxton who was Secretary of the Anti-Slavery Society from 1898 to 1909, and of the combined Societies from 1909 until 1934 when he was elected one of the Vice-Presidents.

Travers Buxton's "out" letters consist of seven bound volumes from 1899 to 1910 (D1 / 1-7) and twenty-eight boxes of carbon copies from 1911 to 1933 (D1 / 8-35). His "in" letters, filed alphabetically, consist of four boxes of soft files corresponding to the years 1910 to 1913 (D2 / 1-4) and twenty-four hard files containing letters from 1914 to 1933, with a gap from December 1914 to May 1915 (D2 / 5-28). Some of these files are in a very dilapidated condition.

Division 2 (D3-D5)

D3-D5 are the letters sent by and to John Harris, later Sir John Harris, and some other papers of his. He was Organising Secretary from 1910 until 1934, and Parliamentary Secretary from then until his death in 1940.

Harris's "out" letters are in two bound volumes for 1910, April to November (D3 / 1-2), and eighty-four hard files from November 1910 to August 1940, except for a gap from October 1914 to March 1915 when he was in Africa (D3 / 3-86). His "in" letters from 1912 to 1924 are in thirteen cardboard boxes (D4 / 1-13) but these do not correspond to the thirteen years they cover as will be seen from the list below.

The remaining Harris papers consist of letters and reports from himself and his wife while on their tours in West Africa, the Congo and South Africa (D5 / 1-3), correspondence about his book Problems of Tropical Labour (D5 / 4), correspondence about their lecture tour of the United States (D5 / 5), and the typescript of his book A Century of Emancipation (D5 / 6).

Division 3 (D6)

There are only four files in the last part of section D. These contain carbon copies of letters sent by the Society to Government offices and official bodies between 1911 and 1939 (D6 / 1-4).

For further details of this section see the list below.