From Untapped cities, “Upper West Side NYC Office Lobby Is A Mini R.O. Blechman Gallery Of New Yorker Covers”
— Noted this on Facebook via J.J. Sedelmaier
Mr. Blechman’s A-Z entry:
R.O. Blechman (photo: Hillsdale, NY, 2017. photo by Elwood Smith). Born, New York, 1930. New Yorker work: Mr. Blechman is, among many other editorial and commercial pursuits, a cover artist for The New Yorker, with his first appearing on the issue of April 29, 1974. His last cover, titled “Eustacia Tilley” appeared on the magazine’s anniversary issue of February 26, 1996. It was inspired by the magazine’s inaugural issue featuring Eustace Tilley. Website: roblechman.com
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A Sketch Of Interest By New Yorker One-Clubber Bill Mauldin
Below you see a sketch (listed on Ebay) by the great Bill Mauldin. And below the sketch, the published version, in The New Yorker issue of April 1, 1950. Mr. Mauldin was one of the approximately 75 cartoonists who dropped by The New Yorker for just appearance (thus qualifying them for membership in the Spill‘s “One Club”). A few of those approximately 75 cartoonists had significant cartoon-related careers outside the magazine. Mauldin was one of those cartoonists (see his A-Z entry below).
Mr. Mauldin’s A-Z entry:
Bill Mauldin 
New Yorker work: one drawing, April 1, 1950. Born, Mountain Park, New Mexico., Oct 1929, 1921. Died, Newport Beach, California, 2003. Mr. Mauldin is best known for his cartoons — as originally published in Stars & Stripes –during WW2 (his work earned him a Pulitzer Prize). For far more information, here’s his Wikipedia entry