Skip to main content


Identifier:  WH977


The Ralph B. Mayo Papers consist of correspondence, financial documents, and miscellaneous materials, span a period from 1926-1975, with the bulk of the papers covering the years 1960 to 1975.

No major rearrangement was required in the organization of the collection, which contains two series of records belonging to Ralph B. Mayo. Series 1 contains personal correspondence and financial documents. Series 2 contains correspondence and financail documents related to the Mayo Trust.

The Mayo Trust was set up for Mayo’s niece and nephew, Daphne Mayo Marinovich and Anthony S. Mayo. Much of the trust correspondence is between Mayo and Daphne and Anthony, and also Winslow Van Devanter, co-trustee. Some correspondence pertains to Mayo’s sister Katherine, Daphne and Anthony’s mother.

SERIES 1 PERSONAL 1926-1975 BOX 1-2

Includes correspondence and financial documents arranged by subject, type of document, and chronologically by year.

SERIES 2 MAYO TRUST 1938-1975 BOX 3-4

Includes correspondence and financial documents arranged by subject, type of document, and chronologically by year.


  • 1926-1975
  • Majority of material found within 1960-1975


The collection is open for research.


All requests for permission to publish, reproduce, or quote from material in the collection should be discussed with the appropriate librarian or archivist. Permission for publication may be given on behalf of the Denver Public Library as the owner of the physical item. It is not intended to include or imply permission of the copyright holder, which also must be obtained by the customer. The Library does not assume any responsibility for infringement of copyright or publication rights of the manuscript held by the writer, heirs, donors, or executors. Reproduction restrictions are decided on a case-by-case basis.


Ralph B. Mayo (1891-1975) was born on January 24, 1891 in Miltonvale, Kansas. He was the son of a Methodist minister, the Rev. Henry Milton Mayo. Their family moved to Denver in 1895 when Rev. Mayo accepted the pulpit of the Cameron Methodist Church. Mayo attended Denver Public Schools, including South High School. In 1912, he received his bachelor's of arts degree from the University of Denver.

Mayo was a widely known accountant in Denver for 55 years. He received his CPA in 1914 and opened his office on April 1, 1915. In 1955, he merged his business, Ralph B. Mayo and Co. with Arthur Young and Co. of New York, an international accounting firm, and became executive director of one of Denver's largest and most prominent accounting firms. He retired from the accounting firm in 1961 and became executive trustee of the Denver Real Estate Investment Association. He held this position until 1969.

Mayo married Florence D. Meredith on June 17, 1912. They had three children: Ralph Jr., Richard and Florence Elaine. Mayo's wife died in 1940. In 1941, Mayo married Cora Yost, a Denver widow.

Mayo was a well-known civic leader in Denver, and was especially active in the Denver area YMCA. He became president of the Denver YMCA in 1926. During his administration, the YMCA sponsored recreation and rehabilitation projects for delinquent youths sentenced by the Juvenile Courts. During the 1920s and 1930s, the YMCA operated an accredited high school and junior college. Mayo was on the YMCA board of trustees at the time of his death.

In addition to receiving recognition awards from the YMCA, Mayo was honored by the Denver Rotary Club, Regis College, University of Denver, Denver Chamber of Commerce, United Way and other organizations.

Mayo served on the DU Board of trustees for more than 50 years, served as vice president of the American Institute of Accountants, and held nearly every office in the Colorado Society of Certified Public Accountants. He also served as officer or member of many other organizations, such as the Iliff Scholl of Theology, DU School of Commerce, Citizen's Mission, Mayor's Budget Committee, Rotary Club, Denver Art Museum, Denver Chamber of Commerce, Denver Community Chest, Rocky Mountain Osteopathic Hospital, National Health and Welfare Association, Denver Citizen's Mission, Colorado Safety Association, Cherry Hills County Club, English Speaking Union, and the Cameron Methodist Church, where he taught Sunday school until he was 60.

Mayo loved golf and numbers. In 1938, he complied a composite scoring table for the National Open Golf Tournament at the Cherry Hills Country Club. When the National Open was held there again in 1960, he had the players' cards entered so he could make the same type of comparison.

Mayo died on October 23, 1975. He was 84 years old. Mayo's wife Cora died on August 21, 1976. She was an ordained minister of the Church of Religious Science and was also active in the community.


4 boxes (4 linear feet)

Language of Materials



Source unknown, 1980.


Repository also has: Rex B. Yeager papers (WH978).

Ralph B. Mayo Papers
Catherine Lyon
December 1998
Language of description
Script of description
Code for undetermined script

Repository Details

Part of the Denver Public Library, Western History and Genealogy Repository

10 W. 14th Ave. Pkwy
Denver CO 80204 United States