=Adam.=--Meanwhile, the Georgian revival was due even more to the genius of the Scotsman Robert Adam (1728-1792). Realising that the existing knowledge of Roman architecture had been derived from public buildings, he visited the only example known then of domestic architecture, the ruins of Diocletian’s Palace at Spalato in Dalmatia. Here in co-operation with the French architect, C. L. Clerisseau, and two experienced draughtsmen, he made the measurements and drawings out of which he projected a restoration of the building in a fine work entitled “The Ruins of the Palace of Diocletian” (1764). To him belongs the credit of inaugurating the modern idea, not yet sufficiently lived up to, of using the monumental style for a number of separate buildings, grouped in one design. His first achievement was on the banks of the Thames just east of Buckingham Street, where the steep descent necessitated a system of vaulted foundations that are said to be a remarkable example of engineering skill. On this Adam erected the dignified design, which, since his brother James co-operated with him, was called after the Greek word _adelphoi_, brothers, =Adelphi Terrace=. Other instances of his group designs are parts of =Fitzroy Square=, the older portion of =Finsbury Circus= and =Portland Place=. Among his country houses is =Keddleston Hall, Derbyshire=. Here he clung to the sprawling plan, in which the offices are widely parted from the main block; but, in the façades, employed large windows, finely grouped, and permitted the sloping roofs to be a strong feature of the design. [Illustration: HOME OF THE POET LONGFELLOW, CAMBRIDGE, MASS. P. 431] [Illustration: CHRIST CHURCH, PHILADELPHIA P. 430] [Illustration: WASHINGTON’S HOME AT MOUNT VERNON REAR VIEW. EXAMPLE OF SOUTHERN COLONIAL. P. 432] [Illustration: ANOTHER SOUTHERN COLONIAL EXAMPLE, MONTGOMERY, ALABAMA P. 432] It was Adam’s idea that the architect should be responsible also for the interior decorations and furniture, thus making each room and its furnishings a unified design. Indeed, that everything outside as well as inside the house, summer-houses, terraces and so-forth, should unite in a single ensemble. In the style of furniture that has been associated with his name he showed a rare taste in blending classical motives with elements of his own fancy; exhibiting a particular skill in the graceful use of curvilinear forms, in which he had a partiality for ovals, and in modelling details that, while very delicate, were neither weak nor petty. As the result of his influence the Georgian interior presented an appropriately dainty setting to the costumes and manners of society, which had abandoned the stiff ostentation of the earlier Georgian period for the graceful elegance of the later mode. AMERICAN COLONIAL ARCHITECTURE