Myrna Bye wanted more details about the murder of her grandfather, an immigrant fruit peddler shot to death in 1911 on the Lewisville-Grapevine Road. In her quest for details, the peddler's granddaughter had first contacted me a decade ago. Together, we had researched coverage of the crime in microfilmed editions of the Star-Telegram. This month, she was on the phone again from her home in Oregon, pleading, seemingly asking the impossible: "Can you find his picture? I want to see what my grandfather looked like." Nowadays, I subscribe to Newspapers.com, a digital service that scours libraries nationwide in search of...