In order to follow intelligently the course of the Santiago campaign, and to understand and appreciate the difficulties with which the medical department of the army had to contend, one must know something of the coast upon which that army landed and the nature of the environment by which it was surrounded. The southeastern coast of Cuba, between the entrance to Santiago harbor and the Bay of Guantanamo, is formed by three parallel ranges of hills and mountains which may be roughly characterized as follows: first, what I shall call the rampart--a high, flat-topped ridge, or narrow table, very steep on the sea side, and broken into long terraces by outcropping ledges of limestone; second, the foot-hills, which rise out of a wooded valley or valleys behind the rampart; and, third, the high mountains of the coast, or Sierra del Cobre, range, which lie back of the foot-hills, at a distance of five or six miles from the sea. This is not a strictly accurate topographical description of the coast, but it is roughly and generally true and will answer my purpose. In the vicinity of Santiago the rampart, or mesa-like elevation which borders the sea, has a height of two or three hundred feet, and stretches eastward and westward, like a stone wall, for a distance of nearly twenty miles. At three points it is cut down to the sea-level in narrow, V-shaped clefts, or notches, which have a width at the bottom of from seventy-five to two hundred yards, and which serve as outlets for three small streams. The first of these notches, as one goes eastward from Morro Castle, is that formed by the mouth of the Aguadores ravine, where the Juragua Railroad, on its way from Siboney to Santiago, crosses the Aguadores or Guamo River, and where the iron railroad-bridge and the approach to the city are guarded by a wooden blockhouse and an old stone fort. In the second notch, about six miles from Aguadores and ten from Morro Castle, are the hamlet and railroad-station of Siboney; and in the third, five miles farther to the eastward, lies the somewhat larger and more important mining village of Daiquiri, which, before the war, was the shipping-port of the Spanish-American Iron Company. There is no harbor, shelter for vessels, or safe anchorage at any of these places; but as the rampart, everywhere else, presents an almost insurmountable barrier, an invading force must either disembark in these notches, or go eastward to the Bay of Guantanamo and march forty miles to Santiago through the foot-hills. General Shafter, after inspecting the coast, decided to land in the notches occupied by the villages of Daiquiri and Siboney. He could then advance on Santiago either along the strip of beach under the rampart, by way of Aguadores and Morro Castle, or over a rough wagon-road running through the valleys and across the foot-hills of the interior, three or four miles back of the rampart.