[186]

(no. 12.)

[Annotated Diagram] North Cut out the block broad size Omit shading put dotted vertical

lines from each letter omit each letter South

(By gravel plain — north of valley of Guasco)

Section north & south through the terrace-bounded valley of Guasco & of a plain north ward of it.

A.A. Upper gravel-terrace

B.B.B. Gravel plain & second terrace

C,D,E Third, fourth & fifth terraces

F Bottom of valley & river, at the town of Ballenar

[South America, p. 45: "Near Ballenar (thirty-seven miles from the mouth of the river), the valley between the summit-edges of the highest escarpments is several miles in width, and the five terraces on both sides are broadly developed: the highest cannot be less than 600 feet above the bed of the river, which itself must, I conceive, be some hundred feet above the sea. A north and south section across the valley in this part is here represented."]

[186v]

Shading?

Terminal line continuous & not broken?

Cut away for words north & south—