Silliman deemed slavery an '' enormous evil '' but also favored colonization of free African Americans in Liberia , serving as a board member of the Connecticut colonization society between 1828 and 1835 .
Silliman deemed slavery an '' enormous evil '' . 
 He favored colonization of free African Americans in Liberia , serving as a board member of the Connecticut colonization society between 1828 and 1835 .