The tourist, with his day or two at a down town hotel, calls Boston a city of narrow streets and ancient graveyards; the dweller in one of the newer avenues is enthusiastic about the modern architecture and regular streets of the Back Bay region. Yet neither of these knows the real Boston, the old West End, with its quaint tree-lined streets sloping from the top of Beacon Hill toward the river.Near the close of any bright afternoon, walk from the State House down the hill, pause half-way, and, glancing back, note the perfect Gothic arch formed by the trees that line both sides of Mount Vernon Street. Admire those old houses which have taken on the rich, deep tones that age so kindly imparts to brick. Then look across the river to the sun just setting behind the Brookline hills,-and admit that even in a crowded city we may catch glimpses of the picturesque.