...unteers. J. M. Schofield, Acting Adjutant-General:-- dear sir: I have the honor to submit the following report of the part taken by the Iowa troops in the late hotly contested battle of Wilson's Creek . At 6 o'clock P. M., of the 9th inst., the First regiment of Iowa Volunteers, under command of Lieut.-Col. Wm. H. Merritt, Col. J. F. Bates being sick, united with the forces at Springfield, und...