1866: Martha Grinder, the Pittsburgh Borgia

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On this date in 1866, serial killer Martha Grinder was hanged in Pittsburgh for a poisoning spree.

The “Pittsburgh poisoner” or — we think rather more colorfully — the “Pittsburgh Borgia” — was supposed to suffer from the 19th century’s favorite mental illness, the now-passe “monomania”, which means overwhelming fixation on some single thing or idea.

The idea? Murder.

The national press was captivated by this woman, “the Lucretia Borgia of that day — a woman who, under the guise of helping her sick neighbors, without apparent motive, poisoned them.”

While killers may be nothing new, and even female killers not exactly unheard-of, it was that absence of any object — love, greed, vengeance, anything — save killing itself that moved the papers: one monomania, feeding on another.

According to The Penalty Is Death: U.S. Newspaper Coverage of Women’s Executions, the Pittsburgh press saluted her as “wretched torturer,” “a demon embodied,” “fiendish”; her arrest caused the Philadelphia Inquirer (Aug. 30, 1865: fresh from the gallows expiation of a national catastrophe) to bemoan “a saturnalia of crime … passing over the land.”

One particular neighbor, Mary Caruthers, was poisoned over a period of weeks by her neighbor and apparent caretaker — just the gender role betrayal to really freak out the 19th century. (The court played along: at one point, it admonished the many women attending for their un-feminine interest in this public trial. No indication that it admonished the Pittsburgh Post for its daily trial dispatches.)

This one murder conviction is why Grinder swung, but by that time she had been conclusively hanged in the public mind as a veritable Locusta.

Martha Grinder did eventually confess (pdf) to Caruthers’s murder and to another, but denied any others; papers postulated a total death toll of at least several more who died under Grinder’s nursing “care.” This strikes one as the sort of circumstantial evidence that could be marshaled against anyone in a caregiving position, especially in an environment of dubious forensic technique, and might prove amenable to liberal adoption by newspapermen free from the burden of proof but fettered to the “Borgia” appellation.

On the other hand, and even though the confession came only on the very eve of hanging, our condemned might be thought incentivized by the executive pardon system to own enough guilt to demonstrate contrition without admitting so much as to undercut any possible sympathy. What has one got to lose, right? If that was her game, she didn’t win it.

“Quite prostrated” by her imminent doom, Grinder was reported to have ground away her final days in an opiate haze, but she composed herself sufficiently for an unexpectedly calm performance on the scaffold.


Philadelphia Inquirer, September 25, 1866.

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