Hi Elizabeth, Yes, I believe Rachel Wilkins did mention Joseph Edminster a couple of times - but not in any great detail. You can read Rachel's letters on the Jennings County GenWeb site - same site where you posted your query to me.
Your Edminster family is connected to my Trousdale family line. James Chapman Edminster married my gr gr grandmothers sister - Martha J. Trousdale, daughter of my 3 great grandparents - John F. and Elizabeth (Green) Trousdale. I believe Delilah Edminster, your ancester, came to Minnesota after the death of husband Joseph and is buried in the Dassel, Meeker Co.,MN Cemetery, located about 30 miles from where I live. My husband and I were at that cemetery last summer and took pictures of James and Martha's headstone - which is the same stone that heads my Trousdale's graves. Interesting!! I would like to compare notes with you on our Jennings Co. families. Contact me by my email - email@example.com Enjoy Rachel Wilkins letters. They are precious. Thanks, Judy Mills Boie - Minnesota