Chapin's successful journalism career crumbled as stress chipped away at his mental health, and he committed a terrible crime. But there were still surprises left to his story. 
Research: 

“Of the Dynamite Explosion in Russell Sage’s Office.” The Leaf-Chronicle (Clarkeville, Tennessee). Dec. 7, 1891. https://www.newspapers.com/image/legacy/353237459/?terms=%22russel%20sage%22&match=1
“A Dynamite Bomb.” The Alliance Herald. Dec. 11, 1891. https://www.newspapers.com/image/legacy/423611027/?terms=%22russel%20sage%22&match=1
“City Slave Girls.” Saturday Evening Kansas Commoner. Aug. 24, 1888. https://www.newspapers.com/image/legacy/382892220/?clipping_id=30641784&fcfToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmcmVlLXZpZXctaWQiOjM4Mjg5MjIyMCwiaWF0IjoxNjYyNDY2MjA3LCJleHAiOjE2NjI1NTI2MDd9.eLdfDQGTjlV-7dafIRsWSWJokfMsSrhH2IM2_6e5T7M
“New York World Editor Kills Wife.” Intelligencer Journal. Sept. 17, 1918. https://www.newspapers.com/image/legacy/557223275/?terms=%22Charles%20E.%20Chapin%22&match=1
Morris, James McGrath. “The Rose Man of Sing Sing: A True Tale of Life, Murder, and Redemption in the Age of Yellow Journalism.” Fordham University Press. 2003.
Chapin, Charles. “Winnetka’s Horror.” Chicago Tribune. Feb. 14, 1884. https://www.newspapers.com/image/legacy/349741239/?terms=Winnetka%27s%20Horror&match=1
“Editor Chapin Sane.” Enid Daily Eagle. Dec. 17, 1918. https://www.newspapers.com/image/legacy/608553349/?terms=%22Charles%20E.%20Chapin%22&match=1
“Mrs. Macaulley’s Crime.” Chicago Tribune. Dec. 25, 1887. https://www.newspapers.com/image/legacy/349513839/?terms=%22william%20macaulley%22&match=1
Chapin, Charles E. “Charles Chapin's Story Written in Sing Sing Prison.” G.P. Putnam. 1920. Read online: https://books.google.com/books?id=UmZMAAAAMAAJ&source=gbs_navlinks_s
“Russell Sage’s Will.” The Ordway New Era. August 3, 1906. https://www.coloradohistoricnewspapers.org/?a=d&d=ONE19060803-01.2.45&e=-------en-20--1--img-txIN%7ctxCO%7ctxTA--------0------
Snow, Richard, “Charles Chapin.” American Heritage. December 1979. https://www.americanheritage.com/charles-chapin
“Prisoner McKeague.” Chicago Tribune. February 26, 1884. https://www.newspapers.com/image/legacy/349741560/?terms=neal%20mckeague&match=1
Roberts, Sam. “Archives From Prisons in New York Are Digitized.” New York Times. July 6, 2014. https://www.nytimes.com/2014/07/07/nyregion/new-york-prison-archives-are-digitized-by-ancestry-com.html
Wingfield, Valerie. “The General Slocum Disaster of June 15, 1904.” New York Public Library. June 13, 2011. https://www.nypl.org/blog/2011/06/13/great-slocum-disaster-june-15-1904
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