Freedom takes on new meaning after trip to Underground Railroad sites (February 2008) - A yellow dog sleeps in the dirt under the Bucktown Store overhang. The sky is a deep blue. Except for a fly buzzing around the dog's head, all is peaceful. But as I step across the worn threshold of the door jam, visibly dipped and smoothed where thousands have placed their feet while entering, my mind whizzes back to the 1830s.