On the slopes of the hill which overshadows the University are the interesting terraces of Colcampata. Here, in 1571, lived Carlos Inca, a cousin of Inca Titu Cusi, one of the native rulers who succeeded in maintaining a precarious existence in the wilds of the Cordillera Uilcapampa after the Spanish Conquest. In the gardens of Colcampata is still preserved one of the most exquisite bits of Inca stonework to be seen in Peru. One wonders whether it is all that is left of a fine palace, or whether it represents the last efforts of a dying dynasty to erect a suitable residence for Titu Cusi's cousin. It is carefully preserved by Don Cesare Lomellini, the leading business man of Cuzco, a merchant prince of Italian origin, who is at once a banker, an exporter of hides and other country produce, and an importer of merchandise of every description, including pencils and sugar mills, lumber and hats, candy and hardware. He is also an amateur of Spanish colonial furniture as well as of the beautiful pottery of the Incas. Furthermore, he has always found time to turn aside from the pressing cares of his large business to assist our expeditions. He has frequently brought us in touch with the owners of country estates, or given us letters of introduction, so that our paths were made easy. He has provided us with storerooms for our equipment, assisted us in procuring trustworthy muleteers, seen to it that we were not swindled in local purchases of mules and pack saddles, given us invaluable advice in overcoming difficulties, and, in a word, placed himself wholly at our disposal, just as though we were his most desirable and best-paying clients. As a matter of fact, he never was willing to receive any compensation for the many favors he showed us. So important a factor was he in the success of our expeditions that he deserves to be gratefully remembered by all friends of exploration. Above his country house at Colcampata is the hill of Sacsahuaman. It is possible to scramble up its face, but only by making more exertion than is desirable at this altitude, 11,900 feet. The easiest way to reach the famous "fortress" is by following the course of the little Tullumayu, "Feeble Stream," the easternmost of the three canalized streams which divide Cuzco into four parts. On its banks one first passes a tannery and then, a short distance up a steep gorge, the remains of an old mill. The stone flume and the adjoining ruins are commonly ascribed by the people of Cuzco to-day to the Incas, but do not look to me like Inca stonework. Since the Incas did not understand the mechanical principle of the wheel, it is hardly likely that they would have known how to make any use of water power. Finally, careful examination of the flume discloses the presence of lead cement, a substance unknown in Inca masonry.