Now I got on my hands and knees, and began to crawl forward very slowly. My gum-blanket hindered me; I took it off, put my glass in it, folded and strapped it, and put it over my shoulder. I was already wet. Again I went forward slowly. Soon I saw another vedette, facing south. I retired, and made progress rapidly through the woods to my left; then I crawled up a long distance. I had hoped to be able to determine the right of the enemy's pickets and then return to Jones and send him with my report, while I should remain at the rendezvous to guide the troops when Jones should have succeeded in guiding them to me. But I had found the pickets posted in a very advantageous position for themselves, and a very difficult one for me; more than an hour had passed since I left Jones; he was already on his way. It took long for me to make a prudent approach. As soon as I could see one of the vedettes, I would retreat through the woods until I was out of danger; then I would go fifty or a hundred yards to my left, and approach, again on my hands and knees until I discovered a man, when I would retreat again, and so on alternately. At one place I saw the picket-line itself stretching across the top of an open hill, with the vedettes concealed, no doubt, in the hollow in front. I was compelled to go almost entirely around a field, taking a back track for a quarter of a mile, and then going forward again on the west side of the field. About ten o'clock the rain ceased, and while I was thus helped in one respect, I was hindered also. The pickets would be more alert, and I felt compelled to keep at a greater distance from the line. I made another advance, and this time continued advancing, for to my gratification I found no extension of the picket-line in front of me. I thought at first that it had been thrown back here, and that I was now going along the western front. To make sure, I turned to the right--to the east--and went perhaps three hundred yards without finding anything, and felt convinced that there was no western front to the rebel line. I continued to advance eastward, going straight toward the railroad. At length I had gone a quarter of a mile, and had found nothing. Now I began to believe that the rebel picket-line had been withdrawn while I was going around the field, and I conjectured that the Confederates had become aware of the approach of our column, and had retreated, or else were concentrating to meet our advancing troops. Suddenly I heard a cannon fire, seemingly a mile away, in a southeasterly direction. For a clear understanding of the situation it would perhaps be well to state here that both Frank and Jones had reached the cavalry under General Emory, at the head of our column, and had reported to him as well as to General Morell; and that our column had advanced by the road we had left, had thrown out a skirmish-line which extended beyond the railroad, but not far enough, and had continued to advance until the enemy were felt.