Tuesday, July 4, at the Salem Maritime Historic Site on Derby Wharf. Celebrations begin at 5 pm with a performance by the Adam Matthew Trio on the main stage, food tents, and Kids Crafts at Derby Wharf. Opening ceremonies begin at 7:15 p.m. followed by a two-hour ‘POPS’ concert by the Hillyer Festival Orchestra, a forty-piece ensemble with vocal soloists …