"If you mean my shirt, it was sold to me for pure silk," the easy traveller returned, in half-diffident correction of the statement.

"We'll meet again!" came the more definite and articulate defiance.

"Perhaps. Who can tell? Arizona, though a large place, has so few people that it is humanly very small."

Now the other man rose in his stirrups, resting the weight of his body on the palm of the hand which was on the back of his saddle. He was rigid, his voice was shaking with very genuine though dramatic rage drawn to a fine point of determination.

"When we do meet, you better draw! I give you warning!" he called.

There was no sign that this threat had made the easy traveller tighten a single muscle. But a trace of scepticism had crept into his smile.

"Whew!" He drew the exclamation out into a whistle.

"Whistle—whistle while you can! You won't have many more chances! Draw, you tenderfoot! But it won't do any good—I'll get you!"

With this challenge the other settled back into the saddle and proceeded on his way.

"Whew!" The second whistle was anything but truculent and anything but apologetic. It had the unconscious and spontaneous quality of the delight of the collector who finds a new specimen in wild places.