FORT LYON, COLO. TER., July 10, 1864.
Capt. W. D. McLAIN,
            Independent Battery Colorado Volunteer Artillery:
    CAPTAIN: I have been detained in this district by order of Colonel Chivington, and ordered to organize and drill G squadron, First Cavalry of Colorado, as a battery. It is very necessary that I should go to my company, as my accounts are unsettled, and I am very anxious to settle them. I have just returned from Garland with two howitzers which were left there. Upon my arrival at this post I found that Lieutenant Burdsal had gone to Fort Larned with the command. He took with him all property for which I am responsible and would not receipt to me for the same. He was in command of the battery by order of Major Wynkoop. Please use your influence and try to get me ordered from here that I may join the battery. In haste.
        I am, respectfully, your obedient servant,
                                                    HORACE W. BALDWIN,
                     Second Lieutenant Independent Battery Colorado Vol. Arty.

Source:

United States. War Dept., United States. Record and Pension Office., United States. War Records Office., et al., "Price's Missouri Expedition," The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies. Published Under the Direction of the Honorable Daniel S. Lamont, Secretary of War. By Major George B. Davis, U. S. Army, Mr. Leslie J. Perry, Mr. Joseph W. Kirkley, Board of Publication. Series I-Volume XLI-In Four Parts. Part II-Correspondence, Etc. Washington: Government Printing Office. 1893. p. 110.