In 1818, Jacob Gruber, a minister from Pennsylvania, was charged with inciting a slave revolt in Maryland when he preached about abolition in Hagerstown.
"Jacob Gruber"
![A page from "Your Maryland: Little-known Histories from the Shores of th Chesapeake to the Foothills of the Allegheny Mountains" by Ric Cottom](https://npr.brightspotcdn.com/dims4/default/3a8bca6/2147483647/strip/true/crop/480x640+0+0/resize/880x1173!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2F34%2Fed%2Fdfd930f949598447addde3bea92b%2Fym-03-23-jacob-gruber.jpg)
Lisa Morgan
In 1818, Jacob Gruber, a minister from Pennsylvania, was charged with inciting a slave revolt in Maryland when he preached about abolition in Hagerstown.