This step, which caused him to be ostracized for a time from the Boston circles in which he had been reared, brought him the cases of the fugitive slaves, Shadrach, Sims and Burns, and of the rescuers of Shadrach.
The arrests of Sims and of Shadrach in Boston in 1851; of "Jerry" M`Henry, in Syracuse, New York, in the same year; of Anthony Burns in 1854, in Boston; and of the two Garner families in 1856, in Cincinnati, with other cases arising under the Fugitive Slave Law of 1850, probably had as much to do with bringing on the Civil War as did the controversy over slavery in the Territories.
In 1851 the Court House was surrounded with chains to prevent the " rescue " of a slave (Sims) held for rendition under the Fugitive Slave Law; another slave (Shadrach) was released this same year, and in 1854 there was a riot and intense excitement over the rendition of Anthony Burns.