Margaret Cowlthorp  Langstaff  (1840-) wife of James Langstaff (1839- 1894).
They left Grenville Co. for new land in Minnesota just prior to the 1871 census 
in Canada.  Nolan and Sharon Spencer of Deerwood, MN lead me to this family.

Parents of Margaret Cowlthorp Langstaff, Richard Cowlthorp and Helen Glenn.  The child
she is holding is not Margaret, but more likely their last born Albert , so the photo 
would have been taken circa 1870.