"After passing Boonsboro' it became my turn to lead the Sixth Corps. That day, just before we started, General Sedgwick ordered me to move on and take up the best position I could over a little stream on the Frederick side of Funkstown. As I moved on, it was suggested to me by him to move carefully. 'Don't come into contact with the enemy; we don't want to bring on a general engagement.' It seemed to be the current impression that it was not desired to bring on a general engagement. I moved on until we came near Funkstown. General Buford was along that way with his cavalry. I had passed over the stream referred to, and found a strong position, which I concluded to take, and wait for the Sixth Corps to come up. In the meantime General Buford, who was in front, came back to me, and said, 'I am pretty hardly engaged here; I have used a great deal of my ammunition; it is a strong place in front; it is an excellent position.' It was a little farther out than I was--near Funkstown. He said, 'I have used a great deal of my ammunition, and I ought to go to the right; suppose you move up there, or send up a brigade, or even a part of one, and hold that position.' Said I, 'I will do so at once, if I can just communicate with General Sedgwick; I am ordered to take up a position over here, and hold it, and the intimation conveyed to me was, that they did not want to get into a general engagement; I will send for General Sedgwick, and ask permission to hold that position, and relieve you.' I accordingly sent a staff-officer to General Sedgwick with a request that I might go up at once and assist General Buford, stating that he had a strong position, but his ammunition was giving out. General Buford remained with me until I should get an answer. The answer was, 'No; we do not want to bring on a general engagement.' 'Well,' said I, 'Buford, what can I do?' He said, 'They expect me to go farther to the right; my ammunition is pretty much out. That position is a strong one, and we ought not to let it go.' I sent down again to General Sedgwick, stating the condition of General Buford, and that he would have to leave unless he could get some assistance; that his position was not far in front, and that it seemed to me that we should hold it, and I should like to send some force up to picket it at least. After a time I got a reply that, if General Buford left, I might occupy the position. General Buford was still with me, and I said to him, 'If you go away from there I will have to hold it.' 'That's all right,' said he, 'I will go away.' He did so, and I moved right up. It was a pretty good position when you cover your troops. Soon after relieving Buford, we saw some Rebel infantry advancing. I do not know whether they brought them from Hagerstown, or from some other place. They made three dashes, not in heavy force, upon our line to drive us back. The troops that happened to be there on our line were