Foxwell on Femmes Fatales blog.

I'm the guest today on the Femmes Fatales blog, talking about my anthology In Their Own Words: American Women in World War I, which will be published September 25. The post includes a photo of the "fingerprint girls" of the war.

Product of the day: "Got evidence?" mousepad.

The "got evidence?" mousepad, from the National Museum of Crime and Punishment.

1891: Galton's fingerprint classification system.

The online exhibition "Trailblazing: Three and a Half Centuries of Royal Society Publishing" includes "1891: The Proof That Fingerprints Are Unique," which discusses the still-used classification system for fingerprints developed by Sir Francis Galton, a cousin of Charles Darwin.

About the image: Galton's fingerprints, from the cover of his book Finger Prints (1892)