We removed that marriage from
www.bishir.org since we believe the person who originally posted it had confused Mary with the daughter of of Jacob Bishir (1796-1868), Mary Ann Bishir who married Gabriel Chaney Willett in 1859. We believe the wife of the Cheney marriage in Maryland was not a Bishir.
In general, we source everything we put on the bishir.org web site so that you can determine the veracity of the information for yourself.
Don Worth -
www.bishir.org