Sarah Carlson gave the students fair warning about what to expect when they reached the caverns, 80 feet below ground.
"It'll be pretty chilly down there," said Carlson, who works in special collections at the University of Minnesota library. "Oh, yeah, you're not going to have any signal," she added, as a teenager fiddled with a cellphone. "Sorry about that, guys."
The students, from Gordon Parks High School in St. Paul, were on a pilgrimage to the underground vaults where the U houses some of its most prized possessions: in this case, the Givens Collection of African-American Literature. But even as they crammed, single-file, into a climate-controlled chamber, the students knew there was an easier way to see what was in some of those boxes.
If only they could get a signal.
For the first time, the U is starting to make collections like the Givens accessible online. It has launched an ambitious project, called Umbra Search, to make it easy to search not only its own collection, but hundreds of African-American archives across the country. All at once.
The year-old website, UmbraSearch.org, "is an amazing resource," said Catherine Squires, a U communications professor, who has been testing it all semester with classes at Gordon Parks.
For students, she said, Umbra is "a one-stop shop" to explore historical images and voices of the past, from slavery to the Harlem Renaissance to the Civil Rights movement. "It's a great tool to increase people's awareness of just how rich that history is," she said.
At this point, only a small fraction of library collections is online. But it's only going to grow as libraries find the time, and money, to digitize more material, said Cecily Marcus, the U librarian who directs the Umbra Project.