 He appears to have left around the same time as Lane, at the end of the decade, and by 1895 was active in the Anarchist Communist Alliance, an organization whose manifesto was written by Max Nettlau.In 1892, Barker became the secretary of Walthamstow Workingmen's Club, a post he held until 1950.Continuing in anarchist activism, in 1930, he was a founder member of the London Freedom Group.