Way of the Lawless by Max Brand (1892 - 1944)

He made one mistake in the beginning. He pushed the chestnut too hard the first and second days, so that on the third day he was forced to give the gelding his head and go at a jarring trot most of the day. On the fourth and fifth days, however, he had the reward for his caution. The chestnut's ribs were beginning to show painfully, but he kept doggedly at his work with no sign of faltering. The sixth day brought Andrew Lanning in close view of the lower hills. And on the seventh day he put his fortune boldly to the touch and jogged into the first little town before him.. (Introduction by Publisher)