Two Mexicans dropped to the street, one shot through the head; the other wounded in the chest.

Other Mexicans had been seen to stagger, and were probably hit.

Thereafter a dozen seamen constantly watched the roofs close at hand, occasionally "getting" a Mexican.
"I know what I would do, if I had authority," Darrin muttered to his superior.

"I'd send back for dynamite, and, whenever we were fired on from a house I'd bring it down in ruins." It was a terrible suggestion, but being fired upon from overhead in a city makes fighting men savage.
Evidently the Mexicans on the hotel roof had been reinforced, for now the fire in that direction broke out heavier than ever.
"Shall I have the machine gun brought up, sir ?" Dave hinted.
"Yes," approved Trent, crisply.

"We'll see what a machine gun can do when brought to bear on a roof." So Ensign Darrin ran back to give the order.