Our colonial ancestors knew how to build houses as well as constitutions. It may even be that they built the one as enduringly as the other, for many of their mansions still stand, firm in joist and beam, having required in nearly two centuries no more serious repairs than shingles and paint. As the Constitution did not spring, a magic structure, fresh from the minds of its builders, but was a welding together of ideas as old as the Magna Carta, so the style of architecture known as Colonial was not a new creation but an adaptation of the Georgian to new material and new social...