Tom Albin uses his lunch break to time-travel.
On the desktop computer at his home office in Minneapolis, the industrial engineer studies the spiky penmanship of another century, squinting to decipher top-secret telegrams from Abraham Lincoln's War Department.
"It sucks you in," said Albin, a lifelong Civil War enthusiast and a descendant of a Union private who rode in an Iowa cavalry regiment.
As a "citizen archivist," he's one of thousands of amateur historians and codebreakers from around the country who donate their spare time to help unlock the secrets of the past.
Volunteers are logging on — at decodingthecivilwar.org — to transcribe thousands of long-lost wartime missives using a crowdsourcing platform developed and managed, in part, by the University of Minnesota.
Civil War historians had long speculated that there were books that contained the scripted, dash-and-dot messages sent to and from the battlefields.
Before the Civil War, couriers were relied on to carry written battlefield instructions or updates. But by the mid-1860s, the breakthrough technology of the telegraph allowed for real-time exchanges between Union officers in the field and Washington-based Cabinet members — and even the Great Emancipator himself.
"There are mentions of Lincoln in the telegraph office holding the ledgers. What happened to them was unknown," said Mario M. Einaudi, the digital project librarian for the Decoding the Civil War project. "It was assumed they'd been destroyed."