Editor John Mitchell, Jr., of the Richmond Planet, has issued a call for the Afro-American Press Association to convene in Chicago September 5, 6 and 7. Hon. C. H. J. Taylor will arrive in the city next week. Hon. H. C C. Astwood was here last week. Mr. Caloway has retired from the Colored American. It is understood that Editor Thornton will also retireV'