Tom Tryniski isn’t trained as an archivist. Nor does he have ties to any institution or receive much compensation for the many hours he’s spent scanning the microform of local newspapers he orders from libraries. Still, he is devoted to the endeavor. Since his retirement in 1999, he has digitized some forty million newspaper pages and posted them to his website, fultonhistory.com. His collection, at three times the size of the Library of Congress’s Chronicling America archive, is in all likelihood the largest free repository of its kind. But there is more work to be done, Tryniski says. “Do you...