The Boston & Northern Street Railway Company (B&N) was a horse-drawn and electric streetcar railroad operated on the streets of Boston, Massachusetts, and communities to the north. Founded in 1859 as the Lynn and Boston Railroad (L&B), via lease and merger it became a primary mass transit provider for northeastern Massachusetts and New Hampshire. Its immediate successor was the Bay State Street Railway (Bay State),[1] and its modern successor is the state-run Massachusetts Bay Transportation Authority (MBTA).[2]