MANY PASSERSBY ON IPSWICH’S EAGLE Street are unaware of the beast that surveys them. With wide, unsettling eyes and ivory fangs bared, the Ogre of Eagle Street keeps watch from above the door of a 17th-century house. At first, this decorative demon seems like little more than an unusual ornamentation, but legend grants it a far greater purpose. The land upon which Eagle Street now occupies was once, so the story goes, a godforsaken bog. This forbidding stretch of mire was populated only by an awful ogre. Despite its unappealing…