H.H. WALES. LADO SUR DE LA ALAMEDA. CALLE de LA ARTILLERIA No. 6. Hotel Internacional S.L.P. San Luis Potosi..................................................de 1903 On this upper scale the flora again changes. All the palms and palmettos are out. Shrubs and trees with the larger trees drop down in the canyon where the railroad ties are secured and dropped by a zigzag road up the mountain side to the railroad at or near Esfinge. Just before rising to Las Canaas we see a pretty series of water falls dropping 100 to 200 feet. This is the beginning of the Tamazulor canyon and on it makes sometimes one falls and then as rapids to Venestegui but where it is falling 1000 for clear the station. It still rushes and drops on to the lower level, a small valley in which is situated the station of Tamazulor. Above the first falls near Las Canaas, in the ranch shaped valley is the lake in the ground. This is ground filled in by rain wash and more a small stream leading into the Tamazulor is cutting its away. Now there is drop from 100 to probably more than 300 feet before it joins the larger stream apparently coming in from the sides. I have at least two pictures of this preliminary drop into the first Tamazulor dry. On the north side of the canyon the mountain rises above Las Canaas probably 2000 feet higher. The south wall is less high. All along from Tamazulor station to Cardenas one sees the Cutaceas in vertical rolls. This a series of closely opposed anticlines and synclines, one of the synclines is seen in the hill to the right of the station La Labor. Among here the air again is cool and one are in the Tierra fria.