Scene.--On the heights overlooking the left bank of the River Tagus.
In the foreground is a road. Flinty rocks, plants and shrubs rise
from right to left towards higher rocks above which they disappear
in a gap. From the gap to the foreground a stony pathway descends in
a curve. At the foot of the scene, below, is the Tagus lying deep
between its banks, and the Bridge of San Martino. On the heights
beyond are the city, the Mirador and the cathedral of San Juan del
Rey in construction. The night is clear and starry. A crescent-shaped
moon gradually disappears to the right behind the rocks near the end
of the act.