On the website http://www.peglynch.com/biography/, Claras's granddaughther Elise Astrid, says:

I have here beside me a telegram dated September 1918 which reads: “Not very well. Perhaps you’d better come soon.” It was sent from Nebraska by Hugh Lynch to his wife and baby daughter, visiting family in Minnesota. My grandmother grabbed my mother, leapt on a train, and arrived frantically at Hugh’s bedside only hours before he, like so many millions of others, succumbed to the deadly Spanish Flu virus. Dr. Mayo wired his colleagues in Nebraska to please offer his nurse Frances Lynch any vaccine available. The hospital had one dose left. Frances gave it to “My”.  My grandmother nevertheless survived, never remarried and never forgave the world for taking her husband away.  Although she brightened considerably of course when I came along, as one would, but we’re not there yet. We have my mother’s career still to get through. Feel free to skim.

Frances and Margaret moved back to the Renning family home in the small town of Kasson, Minnesota, fifteen miles west of Rochester. Margaret was looked after by her Norwegian maternal grandfather and various teenage aunts and uncles while Frances resumed her job at the Mayo Clinic, commuting the fifteen miles home by bus at the weekend. Despite missing her mother and having no father, despite loathing Minnesotan winters--a factor in which her ability to wear three sweaters at once and still be cold no doubt has its origins—Mama says she had a pleasant childhood.