Observing all these tactical exercises with lively interest and careful attention, Al soon began to comprehend the methods and objects of movements which at first seemed wholly bewildering. He obtained a copy of the "United States Infantry and Rifle Tactics," the text book then in use for the instruction of the United States troops, and spent evening after evening studying them until he was much more familiar with the contents than the average volunteer soldier several years his senior. Though he could not utilize his knowledge because of his youth, he persisted in acquiring it, not only because he liked it but because he felt that eventually it would be useful to him, especially if he could ever carry out his cherished ambition of entering West Point. One day in the Spring of 1863, Mr. White called Al into his private office. "The chief commissary of subsistence in this city has asked me if I could tell him of a few good men to act as civilian clerks in his department," said he. "They must be men who understand something of staple groceries such as the army uses and who know how to get out orders and ship goods. Would you like to have such a position for a while?" Al's eyes brightened. Such work would place him in closer touch with the army, an object which appealed to him strongly. But he bore in mind his obligations and answered, cautiously, "I should like it very much, Mr. White, if you approve of it and if I could make as much as I do now." "The position will pay you a little more than you are getting now," said Mr. White, leaning back in his chair as if to give plenty of time to the discussion, "and it will give you some valuable experience if you aim to continue in the wholesale grocery business. The commissary department is handling enormous quantities of goods in St. Louis now and an insight into the Government's methods of transacting such a volume of business will be a great benefit to you. Of course, whenever you want to leave the Government's employ and come back here, your position will be open for you. You are very young for such a place but you have made such rapid progress and learned to do your work so well and thoroughly that I shall have no hesitation in recommending you as one of my best employees." "Thank you, sir," said Al, flushing with pleasure. "I hope I deserve it."