During their married life Ruth and Warren remained in Libertyville where they raised two children, Warren Jr. and Edith, and spent many years in their home on Sunset Drive. Warren was employed as a building materials salesman for Celotex Corporation and he also spent many years as a dedicated civil servant. He was a senior member of the village board, having served 33 years as a trustee.
In May of 1964 the Nicholases were honored at a reception celebrating their 50th wedding anniversary.
Sadly, Warren died just months later on September 10, 1964 at the age of 74. In a tribute to Warren, Libertyville's Mayor Berry said, "He's made so many contributions over the years, his loss will be felt by every resident of the community." Ruth followed Warren in death 11 years later on April 30, 1975. She was 81. They are buried next to each other in Lakeside Cemetery.