Dr. McCLELLAND. The machine--there was a changeover, just as I came in, one of the doctors in the room, I don't recall which one, had been operating what we call an intermittent positive pressure breathing machine. Mr. SPECTER. Had that machine been utilized prior to your arrival? Dr. McCLELLAND. It was in use as I arrived, yes, and about the same time I arrived--this would be one other doctor who came in the room that I forgot about--Dr. Jenkins, M. T. Jenkins, professor of anesthesiology, came into the room with a larger anesthesia machine, which is a better type machine with which to maintain control of respiration, and this was then attached to the tube in the President's tracheotom; anyway, respiratory movements were being made for him with these two machines, which were in the process of being changed when I came in. Then, as I took my post to help with the tracheotomy, I was standing at the end of the stretcher on which the President was lying, immediately at his head, for purposes of holding a tracheotom, or a retractory in the neck line. Mr. SPECTER. What did you observe, if anything, as to the status of the neck wound when you first arrived? Dr. McCLELLAND. The neck wound, when I first arrived, was at this time converted into a tracheotomy incision. The skin incision had been made by Dr. Perry, and he told me--although I did not see that--that he had made the incision through a very small, perhaps less than one quarter inch in diameter wound in the neck. Mr. SPECTER. Do you recall whether he described it any more precisely than that? Dr. McCLELLAND. He did not at that time. Mr. SPECTER. Has he ever described it any more precisely for you? Dr. McCLELLAND. He has since that time. Mr. SPECTER. And what description has he given of it since that time? Dr. McCLELLAND. As well as I can recall, the description that he gave was essentially as I have just described, that it was a very small injury, with clear cut, although somewhat irregular margins of less than a quarter inch in diameter, with minimal tissue damage surrounding it on the skin. Mr. SPECTER. Now, was there anything left for you to observe of that bullet wound, or had the incision obliterated it? Dr. McCLELLAND. The incision had obliterated it, essentially, the skin portion, that is. Mr. SPECTER. Before proceeding to describe what you did in connection with the tracheostomy, will you more fully describe your observation with respect to the head wound?