In the first place, I want to make the mobilization a first-class training for the Army, and I wish you would give your time and that of the War College to advising and carrying out maneuvers of a useful character, and plan to continue to do this during the next three months. By that time we may expect that either Ambassador Wilson's fears will have been realized and chaos and its consequences have ensued, or that the present Government of Mexico will have so readjusted matters as to secure tranquillity-a result devoutly to be wished. The troops can then be returned to their posts. I understood from you in Washington that Gen. Aleshire said that you could probably meet all the additional expense of this whole movement out of the present appropriations if the troops continue in Texas for three months. I sincerely hope this is so. I observe from the newspapers that you have no blank cartridges, but I presume that this is an error, or that it will be easy to procure those for use as soon as your maneuvers begin. Second. Texas is a State ordinarily peaceful, but you can not put 20,000 troops into it without running some risk of a collision between the people of that State, and especially the Mexicans who live in Texas near the border and who sympathize with the insurrectos, and the Federal soldiers. For that reason I beg you to be as careful as you can to prevent friction of any kind. We were able in Cuba, with the army of pacification there of something more than 5,000 troops, to maintain them for a year without any trouble, and I hope you can do the same thing in Texas. Please give your attention to this, and advise all the officers in command of the necessity for very great circumspection in this regard. Third. One of the great troubles in the concentration of troops is the danger of disease, and I suppose that you have adopted the most modern methods for preventing and, if necessary, for stamping out epidemics. That is so much a part of a campaign that it hardly seems necessary for me to call attention to it. Finally, I wish you to examine the question of the patrol of the border and put as many troops on that work as is practicable, and more than are now engaged in it, in order to prevent the use of our borderland for the carrying out of the insurrection. I have given assurances to the Mexican ambassador on this point. I sincerely hope that this experience will always be remembered by the Army and Navy as a useful means of education, and I should be greatly disappointed if it resulted in any injury or disaster to our forces from any cause. I have taken a good deal of responsibility in ordering this mobilization, but I am ready to answer for it if only you and those under you use the utmost care to avoid the difficulties which I have pointed out.