After one of his transports , the slaves he had moved north had been captured and held in Vincennes to determine where they should be sent .
Seth Concklin ferried runaway slaves from points in the south by boat to Evansville .
After one of Seth Concklin 's transports , the slaves Seth Concklin had moved north had been captured and held in Vincennes to determine where they should be sent .
Seth Concklin ferried runaway slaves from points in the south by boat to Evansville .