Ostracised though he was, he did not lack for civic spirit of a sort. When the Colony House burned down, he subscribed handsomely to the lotteries by which the new brick one—still standing at the head of its parade in the old main street—was built in 1761. In that same year, too, he helped rebuild the Great Bridge after the October gale. He replaced many of the books of the public library consumed in the Colony House fire, and bought heavily in the lottery that gave the muddy Market Parade and deep-rutted Town Street their pavement of great round stones with a foot-walk or "causey" in the middle. About this time, also, he built the plain but excellent new house whose doorway is such a triumph of carving. When the Whitefield adherents broke off from Dr. Cotton's hill church in 1743 and founded Deacon Snow's church across the Bridge, Curwen had gone with them; though his zeal and attendance soon abated. Now, however, he cultivated piety once more; as if to dispel the shadow which had thrown him into isolation and would soon begin to wreck his business fortunes if not sharply checked.