According to The History of a Kincaid Family By James Bernard Newman, both Jennie and Stephen were teachers. Her brother writes to invite them to move to Kansas, however, the local school system there prefers female teachers making it difficult to secure a job for Stephen. They did purchase farm land with Jennie's brother soon after that time.
Prior to her death in 1873, Jennie is a teacher in the Maine, NY school system. It is likely Stephen teaches there, also.