[Parker, Theodore] 1810-1860, supposed author. Caution!$ Colored people of Boston, one and all, you are se. advised, to avoid conversing | with the watchmen and police officers of Boston, for since the recent order of the Mayor and Al- dermen, they are empowered to act as kidnappers and slave catchers ... April 24, 1851. [Bos- ton, Massachusetts Ant4-slavery Society, 1851] broadside. 41 x 27cm, Parker, in an A.N,S, to Francis Jackson of 20 Apr, 1851 (Boston Public Library Ms.A.2 v.20 (Continued ®& on next card)