1. “Guide to the Martha Matilda Harper Papers,” Rochester (New York) Museum & Science Center, 2019.
  2. Ingredients in the Moscano Tonique later produced in Harper-owned facilities were listed as “Cantharides, Sage, Salt, Quinine and Alcohol 50% by Volume.” See Joanne Brokaw, “Martha Matilda Harper—Innovator in Beauty and Business,” Rochester Subway, 26 December 2015. http://www.rochestersubway.com/topics/2015/12/martha-matilda-harper-innovator-in-beauty-and-business/ accessed 4/27/2020; Jane R. Plitt, Martha Matilda Harper and the American Dream (Syracuse: Syracuse University Press, 2000), 15.
  3. Golden Memories, 1938, Rochester, NY: Harper Methods, Inc.
  4. Golden Memories, 1938, Rochester, New York: Harper Methods, Inc.
  5. Helen P. Smith took Primary class instruction from Mary Baker Eddy at the Massachusetts Metaphysical College, in a class that began March 5, 1888. “The Students of Mary Baker Eddy,” The Mary Baker Eddy Library, https://www.marybakereddylibrary.org/research/who-took-classes-on-christian-science-with-mary-baker-eddy/ accessed 4/27/2020.
  6. Golden Memories, 1938, Rochester, New York: Harper Methods, Inc.
  7. Plitt, Martha Matilda Harper. A system of dual membership includes joining with The Mother Church in Boston and affiliation with a local branch church.
  8. Plitt, Martha Matilda Harper, 28; Mary Baker Eddy, Science and Health with Key to the Scriptures, 224.
  9. Eddy, Science and Health, 128.
  10. “Guide to the Martha Matilda Harper Papers,” 2019.
  11. A list “Authorized Harper Method Shops” is reprinted as back matter in Plitt, Martha Matilda Harper.
  12. Plitt, Martha Matilda Harper, 138–139.
  13. Plitt, Martha Matilda Harper, 133.