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H. H. Holmes - Wikipedia
H.H. Holmes | Biography & Facts | Britannica
H.H. Holmes: Biography, Serial Killer, Murderer
How serial killer H.H. Holmes was executed - Chicago Sun-Times
This Is How Serial Killer H.H. Holmes Died - Grunge
The Enduring Mystery of H.H. Holmes, America's 'First' Serial Killer
Serial killer H.H. Holmes is hanged in Philadelphia - HISTORY
H.H. Holmes: The Victims of Chicago's First Serial Murderer - Biography
H.H. Holmes - Crime Museum
His Body Unearthed, Legend of Mass Murderer H.H. Holmes …