I have this family history of N. Charles and Irma Elisabeth Doughterty.
Family: 1920 Census, Sheridan, Wyoming
Charles is listed on a separate page, taken at the mine.
Lizzie Clearwater, age 33
Dorothy C, (from death record, born 28 Jan 1905, Nebraska, died 2 Feb 1921 in Sheridan, Wyoming of Typhoid Fever)
Fred, (from death record, born 22 Feb 1906, died from crushed chest, a result of being crushed beneath "loaded trip car" at Acme Mine)
Gladys, born 29 Nov 1909 at Lakeside, Nebraska, married to Victor Miller on 2 Feb 1926 in Billings, Montana. She died 10 May 1983 at Sheridan. Her obit gives the following children as surviving:five sons: Robert or Casper; Jim, Hardin, Montana; Victor, Bill and Clarence "Sam" all of Sheridan, and three daughters, Irma Salstrom and Betty Nelson, Sheridan, and Dorothy Stanko Dodd, Casper; a sister Helen Miller, Bellingham, Washington, and three brothers, Bernard, Arthur and Clarence Clearwater, all of Bellingham.
Delmar, born Nebraska
Helen, born Nebraska
Bernard, born Wyoming
Glen, born Wyoming
1930 Census - Bellingham, WA
N Charles, age 47, born Iowa, father born Iowa, mother Indiana
Irma, age 43, born Ireland, parents born Ireland
Delmar R, son, age 18
Helen, age 15
Glen, age 11
Robert W, age 8, born Wyoming
Clarence R, age 7, born Wyoming
Arthur, age 4, born Wyoming
I have no date of death for N. Charles. For his wife Irma Clearwater, she died 12 Dec 1965 in Bellingham, WA. She was born 12 Apr 1883 in Ireland, came to the United States when 18 years old with an uncle, Bernard Reed, settling in Nebraska. There she married Charles Clearwater. Later they came to Clearmont, then to Sheridan and the coal mines. Charles is not mentioned in her obit, whether deceased, divorced, etc. is a mystery.
This is all I have so far on this family. I hope they are in your data base.