Henderson was a teacher in a one-room school in Long Creek, Prince Edward Island in the 1880s.
Around August 1885, she was contacted by PEI painter Robert Harris.
Henderson told Harris of a confrontation she had had with local school trustees.
This event inspired Harris to paint his A Meeting of the School Trustees.
The meeting between Henderson and the trustees was portrayed by a Heritage Minute short feature on Canadian television starting around the 1990s.