From what i understand the first time two blacks fought for a title was when Kid Dixie took the WW title from Walcott. What year was that?
Some stories about Walcott by his manager Tom O'Rourke http://senya13.blogspot.com/2012/02/tom-orourke-manager-of-joe-walcott.html
Hope this is of interest? http://www.bajanreporter.com/2007/02/barbados-had-a-contender-yup-he-was-one-hell-of-a-pugilist/