By 1900 the Jewish Year Book was in its fifth year of publication, and was packed with useful information about the Jewish community in the British Empire.
The original editor, Joseph Jacobs, had gone to the United States to work on the Jewish Encyclopedia. The new editor, Reverend Isidore Harris, was born in London in 1853, and educated at Jews College and University College, London. He was the Minister of the West London Synagogue of British Jews.
As well as the calendar, information about Synagogues, charities and other organizations, information about Jewish communities all over the British Isles and other features, the 1900 book has this very interesting list of Jews who fought in the Boer War.