I'm doing research on London and Liverpool of the 1890s and want to give a shout out to Liverpool historian Raymond Costello for sharing with me a copy of his out-of-print paperback, John Archer (1863-1932) The Story of Britain's First Black Mayor. Martha Ann Ricks was likely acquainted with John Archer and his wife.
Black Liverpool and recently on Black seaman in the UK titled Black Salt. I've read the Black Liverpool book - fascinating insights on the community!
Here are a couple links for more information on John Archer:
* From Nerve 11 - bio
* 100 Great Black Britons - bio