Question: Sheldon Warren Cheney, was an American author and art critic, born at Berkeley, California, the son of May L. Cheney, was appointment Secretary at University of California, Berkeley for over how many years?
Context: The University of California, Berkeley (also referred to as UC Berkeley, Berkeley, and Cal ) is a public research university located in Berkeley, California.  Founded in 1868, Berkeley is the oldest of the ten research universities affiliated with the University of California system (although UCSF was founded in 1864 and predates the establishment of the UC system) and is ranked as one of the world's leading research universities and the top public university in the United States. Jerry Saltz (born February 19, 1951) is an American art critic.  Since 2006, he has been senior art critic and columnist for "New York" magazine.  Formerly the senior art critic for "The Village Voice", he has been nominated for the Pulitzer Prize in Criticism three times.  He has also contributed to "Art in America, Flash Art International, Frieze, Modern Painters", among various other art publications.  Saltz served as a visiting critic at The School of Visual Arts, Columbia University, Yale University, and The School of the Art Institute of Chicago and the New York Studio Residency Program, and was the sole advisor for the 1995 Whitney Biennial.  He lives in New York City with his wife Roberta Smith, senior art critic for the New York Times. Theatre Arts Magazine, sometimes titled Theatre Arts or Theatre Arts Monthly, was a magazine published from November 1916 to January 1964.  It was established by author and critic Sheldon Warren Cheney. Moira Roth is a feminist art historian and art critic who is Trefethen Professor of Art History at Mills College in Oakland, California.  She has written extensively on contemporary art.  Her collection of essays, "Difference/Indifference: Musings on Postmodernism, Marcel Duchamp and John Cage", was published, with a commentary by Jonathan D. Katz, by Psychology Press (1998), exploring the construction of masculinity and conflicting identities.  She was educated at the London School of Economics in England, and received a B.A. in sociology and an M.A. from New York University and a PhD from the University of California, Berkeley in 1974.  She received the 2006 National Recognition in the Arts Award from the College Arts Association. May Lucretia Shepard Cheney (May 11, 1862 – April 22, 1942) was born during the Civil War in Garden Grove, Iowa, and was named after the month in which she was born, and her maternal grandmother who influenced her childhood.  May's early school attendance was in her hometown.  She attended high schools in Oakland and Chico, California before enrolling at UCB in 1879.  With her widowed mother, she settled at "2020 Hearst Avenue" (then "College Way"), in a house with a watermill in the rear yard.  Residing in the same house was Lemuel Warren Cheney (1858–1921), a law student. Midori Kono Thiel (born June 7, 1933 in Berkeley, California) is a Japanese American calligrapher based in Seattle.  She grew up on Maui.  She received her bachelor of arts and master of fine arts from the University of California, Berkeley.  She has exhibited at the De Young Museum, San Francisco; Tokyo Metropolitan Art Museum; Seattle Art Museum; Portland Art Museum; Henry Art Gallery, Seattle; Cheney Cowles Art Museum, Spokane; and the Wing Luke Museum of the Asian Pacific American Experience, Seattle. The University of California, Berkeley, School of Law, commonly referred to as Berkeley Law and Boalt Hall, is one of 14 schools and colleges at the University of California, Berkeley.  Berkeley Law is consistently ranked as one of the top law schools in the nation.  The law school has produced leaders in law, government, and society, including Chief Justice of the United States Earl Warren, Secretary of State of the United States Dean Rusk, Attorney General of the United States Edwin Meese, United States Secretary of the Treasury and Chairman of the Federal Reserve G. William Miller, Solicitor General of the United States Theodore Olson, and lead litigator of the "Korematsu v. United States" civil rights case, Dale Minami. The University of California Jazz Ensembles, also known as the UC Jazz Ensembles, UC Jazz, or UCJE, is the student jazz organization founded in 1967 on the University of California, Berkeley, campus.  Founded in 1967, it comprises one or more big bands, numerous jazz combos, a vocal jazz ensemble, an alumni big band, and instructional classes.  With a mission statement to foster a community for the performance, study, and promotion of jazz at U.C. Berkeley, its Wednesday Night big band provides free concerts every Thursday noon on Lower Sproul Plaza, its various units perform throughout the San Francisco Bay Area including area high schools, travel to collegiate jazz festivals, and perform overseas, and for many years it sponsored the annual Pacific Coast Jazz Festival.  It also provides master classes by its instructors and clinics by prominent guest artists.  It has nurtured numerous musicians who have become professional jazz musicians and educators.  UC Jazz Ensembles is one of three groups, with the Cal (marching) Band and UC Choral Ensembles, forming Student Musical Activities (SMA), a department within Cal Performances on the U.C. Berkeley campus.  Its members are primarily U.C. Berkeley undergraduate and graduate students, representing many academic disciplines. Peter Frank (born 1950, New York) is an American art critic, curator, and poet who lives and works in Los Angeles.  He was the Senior Curator at the Riverside Art Museum and an art critic for "Angeleno" magazine.  He is a frequent contributor to "The Huffington Post".  Until July 9, 2008, he was a long-time critic for "LA Weekly".  He was a past editor of "Visions Art Quarterly" and was an art critic for "The Village Voice" and "The SoHo Weekly News" in New York. Sheldon Warren Cheney (June 29, 1886 – October 10, 1980) was an American author and art critic, born at Berkeley, California, the son of Lemuel Warren Cheney (1858–1921), California lawyer and writer, and May L. Cheney (1862–1942), Appointment Secretary at University of California, Berkeley for over forty years.  At first he worked in his father's real estate business, later moving to Detroit where he founded the "Theatre Arts Magazine" in 1916 and edited it until 1921.  Cheney was one of the most significant pro-modernist theatre and art critics of the early twentieth century.  He helped introduce European modernist practices in theatre to the United States.  His "Theatre Arts Magazine" promoted American little theatre activity, advocated for New Stagecraft design, and nurtured new American playwrights.
Answer: forty