Tucked away on an upper floor of the University at Buffalo's Undergraduate Library in the Science and Engineering Library (SEL) Map Collection room, geographer Ernest L. Woodson helps people find links and clues to the past that often only old maps can reveal. Woodson, an associate librarian in the SEL, is in charge of the University Libraries Map Collection, which he began developing in 1974 when it was made up of only 50,000 maps. Today, the prized collection includes more than 350,000 maps and aerial photos.