"Here, youse," he shouted, "get further back, you're in the picture. Or, say, no, stay right where you are. You," he said, pointing to me, "stay right where you are and I'll give you a dollar to just hold that horror; you understand, just keep on registering it. Don't do another thing, just register that face."

His words were meaningless to me. I had never known before that it was possible to make money by merely registering my face.

"No, no," cried out Raymon, "my friend here is not wanting work. He has a message, a message of great importance for General Villa."

"Well," called back the boss, "he'll have to wait. We can't stop now. All ready, boys? One—two—now!"

And with that he put a whistle to his lips and blew a long shrill blast.

Then in a moment the whole scene was transformed. Rifle shots rang out from every crag and bush that bordered the gully.

A wild scamper of horses' hoofs was heard and in a moment there came tearing down the road a whole troop of mounted Mexicans, evidently in flight, for they turned and fired from their saddles as they rode. The horses that carried them were wild with excitement and flecked with foam. The Mexican cavalry men shouted and yelled, brandishing their machetes and firing their revolvers. Here and there a horse and rider fell to the ground in a great whirl of sand and dust. In the thick of the press, a leader of ferocious aspect, mounted upon a gigantic black horse, waved his sombrero about his head.

"Villa—it is Villa!" cried Raymon, tense with excitement. "Is he not magnifico? But look! Look—the Americanos! They are coming!"

It was a glorious sight to see them as they rode madly on the heels of the Mexicans—a whole company of American cavalry, their horses shoulder to shoulder, the men bent low in their saddles, their carbines gripped in their hands. They rode in squadrons and in line, not like the shouting, confused mass of the Mexicans—but steady, disciplined, irresistible.

On the right flank in front a grey-haired officer steadied the charging line. The excitement of it was maddening.

"Go to it," I shouted in uncontrollable emotion. "Your Mexicans are licked, Raymon, they're no good!"

"But look!" said Raymon. "See—the ambush, the ambuscada!"

For as they reached the centre of the gorge in front of us the Mexicans suddenly checked their horses, bringing them plunging on their haunches in the dust, and then swung round upon their pursuers, while from every crag and bush at the side of the gorge the concealed riflemen sprang into view—and the sputtering of the machine guns swept the advancing column with a volley.