Dr. Tisco, covertly, was intently watching the eyes and faces of the
young engineers. The secretary was most anxious to take an
accurate measure of these two young Americans, who were now highly \
important to his plans.

After the evening meal, Don Luis summoned a number of his home
retainers, who played mandolins and guitars. Some of them sang
with considerable sweetness and power. The full moon, soon to
wane, shed lustrous light over the tropical scene of beauty.
It was a delightful evening. Tom and Harry, when they retired,
found themselves ready to sleep instantly. Their bedrooms opened
into a common parlor. Early in the morning they were astir.

"What shall we wear, Tom?" inquired Hazelton, going toward his trunks.

"Eh?"

"I wonder what people wear in Mexico," Harry continued. "I don't
want to make any mistake in my clothing."

"The best clothing for engineers about to go down into a mine will
be top-boots, khaki trousers and flannel shirts."

"But will that be suitable to go to breakfast in?" Harry asked.
"Will it be showing sufficient courtesy to our host? And suppose
the daughter should be at table?"

"That's so," Reade nodded. "I am sorry that we didn't fish for points
last evening."