From the Calvario hill we had a splendid view of those white solitudes whither we were bound, now only twenty-five miles away. It seemed clear that the western or truncated peak, which gives its name to the mass (koro = "cut off at the top"; puna = "a cold, snowy height"), was the highest point of the range, and higher than all the eastern peaks. Yet behind the flat-topped dome we could just make out a northerly peak. Tucker wondered whether or not that might prove to be higher than the western peak which we decided to climb. No one knew anything about the mountain. There were no native guides to be had. The wildest opinions were expressed as to the best routes and methods of getting to the top. We finally engaged a man who said he knew how to get to the foot of the mountain, so we called him "guide" for want of a more appropriate title. The Peruvian spring was now well advanced and the days were fine and clear. It appeared, however, that there had been a heavy snowstorm on the mountain a few days before. If summer were coming unusually early it behooved us to waste no time, and we proceeded to arrange the mountain equipment as fast as possible. Our instruments for determining altitude consisted of a special mountain-mercurial barometer made by Mr. Henry J. Green, of Brooklyn, capable of recording only such air pressures as one might expect to find above 12,000 feet; a hypsometer loaned us by the Department of Terrestrial Magnetism of the Carnegie Institution of Washington, with thermometers especially made for us by Green; a large mercurial barometer, borrowed from the Harvard Observatory, which, notwithstanding its rough treatment by Mr. Hinckley's mule, was still doing good service; and one of Green's sling psychrometers. Our most serious want was an aneroid, in case the fragile mercurials should get broken. Six months previously I had written to J. Hicks, the celebrated instrument maker of London, asking him to construct, with special care, two large "Watkins" aneroids capable of recording altitudes five thousand feet higher than Coropuna was supposed to be. His reply had never reached me, nor did any one in Arequipa know anything about the barometers. Apparently my letter had miscarried. It was not until we opened our specially ordered "mountain grub" boxes here in Chuquibamba that we found, alongside of the pemmican and self-heating tins of stew which had been packed for us in London by Grace Brothers, the two precious aneroids, each as large as a big alarm clock. With these two new aneroids, made with a wide margin of safety, we felt satisfied that, once at the summit, we should know whether there was a chance that Bandelier was right and this was indeed the top of America.