H. H. WALES. LADO SUR DE LA ALAMEDA Hotel Internacional S.L.P. CALLE DE LA ARTILLERIA No. 6 San Luis Potosi, de 190 Beyond Oriz the country is puffed with narrow cretaceous walls, be [illegible] all the way to San Dieguillo to one thin more study than I can tell, I ran through a series of these constantly rising and the ways to Tamaspor for a distance of 41 Kilometers. Five or so kilometers north of Oriz we begin to get our first glimpses of the rock - the pretty - Cretaceous size. Between San Dieguillo and Tamaspor we pass several times over a somewhat dirty stream as big as the Little Miami and finally arriving at Tamaspor we have before us the red Cretaceous cliff or debris-filled wall. Have a picture yet from the Tamaspor eating station. In other words we can now view one the first a large Cretaceous wall and are now soon to undertake the ride over the second end by far the higher wall. Standing at Tamaspor station and looking at the high wall and the cliff to the right one is puzzled to trace the track along this wall. A [illegible] and one of the greatest pieces of railway engineering in the world. This great wall must be 200 feet high while the cliff to the right of the canyon may rise to 5000' nearly the altitude of the upper mesas on which we are to ride (see Campbell and Holden for data). Just as soon as one begin to rise out of the Pleistocene plain [illegible] into the Tertiary size the flora changes. The jungle drops out and its place is replaced by the groves of true palms and palmettos. One ran through these parts up to Tamaspor and a little into the canyon where they too drop back. These true palms have in their leaf fronds many forms (3 species), orchids and other flowers. As firs on the ground are seen in fact in none of the lower slopes - to one a remarkable fact. Oriz is scenic on the foot Cretaceous rise and on the higher Tertiary levels.