excluding all consideration of the special or extra-duty men, those sick, and those in arrest. As this manner of estimating was applied to both armies, it seemed to me the most equitable and satisfactory.
In taking notes from the returns on file in the Archive Office at Washington, I aimed to arrive at the "effective total." This in the "field returns" was readily determined by adding together the officers and enlisted men present for duty; but in the case of the "monthly reports" it was a very natural error for one to take the addition of the column headed "effective total" as representing the effective strength. Now, it so happened that the basis of my estimate of the strength of General Lee's army at Gettysburg was the monthly report of the 31st May, 1863, and not a field return. I, therefore, took the total amount of the column headed "effective total"—viz., 68,352—as representing what is generally understood by that term, and under the impression that the extensions under that column embraced the officers and men present for duty.
I was the more naturally led into this error, as Mr. Swinton, whose figures I had before me, had done precisely the same thing. Lieutenant-General Early having directed my attention, on the 9th instant, to the discrepancy between certain figures given by General Humphreys from the same return to the Comte de Paris and my own, and having expressed his apprehension that I took the figures from the column headed "effective total," inasmuch as, excluding the cavalry, the strength of the army as taken from the field return of the 20th May, 1863, was greater than that taken from the monthly report of the 31st May, 1863, I began to suspect that the officers were not included in the estimate given. I at once made application to the War Department for the information necessary to settle the matter, and having been kindly favored with a prompt reply to my request, I have been enabled to review my figures, and find that the estimate of strength on the 31st May, 1863, does not include the officers present for duty. At that date the effective strength of General Lee's army was as follows: Longstreet's command, 29,171; A. P. Hill's command, 30,286; cavalry, 10,292; artillery, 4,702. Total effective of all arms, 74,451. And carrying out the same reasoning as that originally pursued, I would say that General Lee had at Gettysburg, including all the cavalry, 67,000 men—that is to say, 53,500 infantry, 9,000 cavalry, and 4,500 artillery.
