Collection Title:  G. Raymond Rettew Papers

Collection Number: MS Coll 264

Dates of Collection: 1928-2023

Extent: 0.4 linear feet

RepositoryChester County History Center, West Chester, PA

Language: English

Project Archivist: Richard McKinstry and Judy Ng


Granville Raymond Rettew was born on April 19, 1903 in West Chester, Pennsylvania, the son of Granville Leon (1872-1934) and Jane Liggett Rettew (1873-1953). Raymond’s father was an attorney and also served as postmaster of West Chester for eight years. As a youth, Rettew was educated locally, and as a teenager, he worked for the post office and on various area farms. In September 1921, he became a day student at Swarthmore Preparatory School from which he graduated the following June. In September 1922, Rettew entered the University of Delaware to study chemical engineering, but in September 1923, he transferred to Swarthmore College where he continued his studies in chemical engineering. As a junior, Rettew changed his focus to straight chemistry, though he left the college in 1926 after neglecting his German studies, a language graduation requirement of Swarthmore. 

Following his departure from Swarthmore and after a few weeks of unsatisfying work in his father’s law office, Rettew accepted a position in Philadelphia as a chemist at the Charles E. Hires Co., which manufactured and distributed Hires Root Beer. Simultaneously, Wilmer J. Divine, Rettew’s father-in-law, who worked in Chester County’s mushroom industry, encouraged him to study the production of mushroom spawn. Eventually, in 1929, this led Rettew to join Joseph W. Strode, an acquaintance, in a mushroom spawn business, Chester County Mushroom Laboratory (CCML). Strode supplied the finances and Rettew served as technical director and administrator. Within three years, the company was the largest mushroom spawn maker in the United States. In 1931, the partners formed a subsidiary, The Premier Mushroom Co., which pioneered frozen mushrooms with Clarence Birdseye and his New Jersey firm, Seabrook Farms. In 1937, another subsidiary, Concord Foods, was founded to can mushrooms. Contacts in England led to the successful production of spawn in that country, and a branch of CCML was established near Worthing, West Sussex in 1934. During these years of corporate development, Rettew wrote a book, Manual of Mushroom Culture, originally issued in 1935 with four editions published by 1948. 

In the early 1940s, Rettew continued his studies of the chemical substances produced by mushroom fungi. In an unpublished memoir from the 1970s, he wrote that “the experience with extracting chemical substance from the fungi plus the techniques used for the production of mushroom spawn made a fine base for the study of Penicillin,” an antibiotic discovered in 1928 by Scottish physician and microbiologist Sir Alexander Fleming (1881-1955). Eventually, Rettew found “a good way to get useful quantities of Penicillin quickly.” Because penicillin was proven to cure the effects of World War II battlefield wounds and other illnesses, in 1943, the federal government stated that its production was a top priority. Rettew’s business, together with Wyeth Laboratories, began to manufacture penicillin commercially, and “the [s]pawn business was literally pushed out the back door.” By the end of June 1943, the first shipment of penicillin was delivered to the government, which controlled its distribution.

Following the war, Rettew continued in the penicillin business. In 1951, recognizing his importance, the West Chester Chamber of Commerce named him Man of the Year, which was celebrated by a banquet attended by 300 people. One year later, Rettew wrote, “We had visitors from all over the world. These visitors continued to come for many years and was one of my most enjoyable duties.” In addition, Rettew traveled to foreign countries, including Brazil, Italy, Belgium, Sweden, and England, on trips connected to the manufacture of penicillin. According to Rettew, for nine years, beginning in 1955, he did consulting on spore germination for the local mushroom industry. In addition, Rettew held several civic leadership roles in the community, including board member of the National Bank of Chester County (1956), President of the West Chester Civic Association (1958), and President of the United Fund of Greater West Chester (1963). 

Having suffered from cancer for some years and in failing health, Raymond Rettew died on June 24, 1973. He is buried in Forks of the Brandywine Presbyterian Cemetery, Glenmoore, Chester County, Pennsylvania. On July 10, 1926, Raymond married Helen Mildred Divine (1903-1986) at Westminster Presbyterian Church in West Chester. They had three children: Jeanne Ann (b. 1927), Robert Scott (1931-2004), and Gregg Laurence (1935-2018).

Raymond’s historic marker (https://www.hmdb.org/m.asp?m=8153), located at the intersection of East Chestnut Street and North Walnut Street in West Chester, reads: “A West Chester chemist, he [G. Raymond Rettew] pioneered the mass production of penicillin, the world’s first antibiotic. In 1943, with Wyeth Laboratories, his lab (a converted auto repair shop here) made and sent more penicillin to the Armed Forces than any other lab in the world, saving countless lives on the battlefields of World War II.”


The papers of G. Raymond Rettew measure 0.4 linear feet and date from 1928 to 2023.  Found within the papers are Rettew’s autobiographical writings, professional correspondence, lab research, and obituary/memorial information.  The collection also includes essays, legal documents, patents, an employee handbook, and newsletters relating to Wyeth Laboratories in West Chester, Pennsylvania, along with additional printed material relating to G. Raymond Rettew and Wyeth Laboratories.

Collection Scope:

The papers of G. Raymond Rettew measure 0.4 linear feet and date from 1928 to 2023.  Found within the collection are Rettew’s personal papers, including an autobiography (ca. 1970) written at the behest of the then Chester County Historical Society director, Travis Coxe, and later used as the basis for A Quiet Man from West Chester

Correspondence consists of professional letters relating to the production of penicillin for the war effort dating from 1942 to 1945. These include letters from the U.S. Department of Agriculture regarding proposed timelines for large scale production of penicillin.  Other letters and interoffice memoranda detail the shipment of samples to/from other laboratories, summarize visits to other labs, and provide detailed workflows regarding the mass production of penicillin in West Chester. There is also additional correspondence concerning professional lectures and travel (1946-1972) and correspondence relating to the production and publication of A Quiet Man from West Chester (1973-1975).

Research materials include Rettew’s written summary of his lab research, including summaries of early test trials from August to December of 1942; diagrams of his laboratory setup and a proposed system to recover penicillin; and a description of his job duties at Wyeth Laboratories, Inc. Obituary, memorial, and historical marker information are also included in his personal papers.

Information on Wyeth Laboratories in West Chester, Pennsylvania consists of essays on the company’s history and the history of penicillin; legal partnership agreements between the company’s owners; patents specific to mushroom spawn/substrate and receptacles; an employee handbook; and Wyeth employee newsletters.

Additional printed materials include copies of Manual of Mushroom Culture, A Quiet Man from West Chester, and Successful Mushroom Growing. Clippings document news coverage of penicillin production during the war and subsequent coverage of G. Raymond Rettew and Wyeth Laboratories. There is also a 2023 program of the premier of The Mushroom Man Who Changed the World, a documentary film by Deborah Divine and Doug Gahm, held at the Chester County History Center.

Information For Researchers:

  • Access: Collection is open for research. Use of original papers requires an appointment and is limited to the Chester County History Center Library.
  • Publication Rights/Terms of Use: The Chester County History Center makes its archival collections available for non-commercial, educational, and personal use unless restricted by copyright and/or donor restrictions, including but not limited to access and publication restrictions.  CCHC makes no representations concerning such rights and restrictions, and it is the user’s responsibility to determine whether rights or restrictions exist and to obtain any necessary permission to access, use, reproduce, and publish materials from the collections.
  • Preferred Citation: G. Raymond Rettew papers, 2028 – 2023.  MS Coll 264.  Chester County History Center, West Chester, Pennsylvania. 
  • Acquisition Information: Additions to the G. Raymond Rettew papers, including legal documents, patents, and printed material, were donated by Rebecca Shirk Blair in 2023.
  • Processing History: Manuscript materials originally filed in the Library’s manuscript Family Files were merged with materials donated in 2023. The collection was fully processed by Judy Ng and a finding aid was prepared by Richard McKinstry in 2023.  

Names and Subject Terms:

  • Subjects:
    • Chemists—Pennsylvania—Biography 
    • Chester County (Pa.)—Commerce 
    • Mushroom culture
    • Mushroom industry—Pennsylvania—History 
    • Penicillin—History 
    • Wyeth Laboratories—History
  • Names, Personal:
    • Rettew, G. Raymond (Granville Raymond), 1903-1973

Collection Arrangement:

The collection is arranged in 3 series:

  • Series 1: Personal Papers, 1928-1984 
  • Series 2: Wyeth Laboratories, 1933-1968 
  • Series 3: Printed Material, 1928-2023

Related Material:

The Chester County History Center also holds materials related to G. Raymond Rettew including several pieces of glass laboratory equipment, and a laboratory table and stool in the Museum collections

Collection Contents:

Box 1

Series 1: Personal Papers, 1928 – 1984

Folder 1            Autobiography, circa 1970

Folder 2            Correspondence, 1942-1945

Folder 3            Correspondence, 1946-1972

Folder 4            Correspondence, Book (A Quiet Man from West Chester), circa 1973-1975

Folder 5            Invitations/Memberships, 1938-1963

Folder 6            Job Description, circa 1970

Folder 7            Lab Diagrams, circa 1946-1970

Folder 8            Lab Research, circa 1928-1970

Folder 9            Obituary/Memorial, 1973

Folder 10          West Chester Historical Marker, 1982-1984


Series 2: Wyeth Laboratories, 1933 – 1968

 Folder 11          Essays, Company History, circa 1943-1953


Folder 12          Essays, by P.H. van Itallie, circa 1952-1960

Folder 13          Legal Documents, circa 1975-1976

Folder 14          Patents, 1933-1946

Folder 15          Printed Material, Employee Handbook, circa 1952

Folder 16          Printed Material, Employee Newsletters, 1966-1978


Series 3: Printed Materials, 1928 – 2023

 Folder 17          Articles, 1929-1945


Folder 18          Book, Manual of Mushroom Culture, 1941

Folder 19          Book, A Quiet Man From West Chester, 1974

Folder 20          Booklet, Successful Mushroom Growing, 1932

Folder 21          Clippings, 1928-1990


Folder 22          Program (The Mushroom Man Who Changed the World), 2023