Linda Rogge is on her own kind of treasure hunt. She’s a first-year graduate student at the University of Nebraska-Lincoln and is looking for historical traces in an old book of poetry. Rogge is part of the Book Traces project, started a few years ago by Andrew Stauffer, a UVA associate professor of English. He’s leading the search on this day at UNL for old books with personal inscriptions, insertions and writings, marks of ownership and use. He’s been doing this for awhile and knows what to look for.