The drawing on the left is by Fermin Rocker and depicts his father, the anarchist Rudolf Rocker, addressing a political meeting. It features on the cover of Bill Fishman's East End Jewish Radicals, 1875-1914.
I interviewed Fermin for a radio programme about his father, and the audio of the programme is available on this site. The interviews deposited at the British Library include several with associates and followers of Rocker, including Nellie Dick and Leah Feldman.
A selection of these oral history interviews and related material is available elsewhere on this site, including: