1860: James Buchanan Jr., considered among the worst U.S. presidents, is on his way out. Slavery is legal. Southern states have begun to secede. The administration of Abraham Lincoln and the start of the Civil War are on the horizon. Meanwhile, back in sleepy little Portsmouth, N.H., the latest City Directory is hot off the presses. The 1860 Portsmouth Directory reads like a telephone book before telephones. It lists the address of every resident and business by