The "Bard of Boston," Josh Lederman, returns after a 4 year recording hiatus with Seven Years A-Roaming. the new full-length CD chronicles his long-running weekly residencies in Cambridge and Somerville with the new ensemble he's amassed, The Cambridge-Somerville All-Stars (CSARs). This rag-tag collective of strings, reeds and accordions is made up of many of the region's premiere roots players.