I am seeking additional information on this person:

Anna Hanson married Rev. Lant M. Hanson. Anna is buried in Rapelje Cemetery in Rapelje, Stillwater Co., Montana. On her headstone it is written like this:

Mrs. L.M. HANSON 1837-1931 #41

My delima is I am trying to locate an exact birthdate (month/year) and also a death date (month/year) on her. If anyone can give me additional advice on this I would appreciate it for I am searching for a copy of an obituary on her.

Her daughter Ruth Hanson is buried beside her.