Interesting...
'then that town-dog is mad in earnest, and he begins to strain and weep and swear, and paw the sand higher than ever, and reach for the cayote with concentrated and desperate energy. This "spurt" finds him six feet behind the gliding enemy, and two miles from his friends. And then, in the instant that a wild new hope is lighting up his face, the cayote turns and smiles blandly upon him once more, and with a something about it which seems to say: "Well, I shall have to tear myself away from you, bub--business is business, and it will not do for me to be fooling along this way all day"--and forthwith there is a rushing sound, and the sudden splitting of a long crack through the atmosphere, and behold that dog is solitary and alone in the midst of a vast solitude!'
Beep, beep.