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Now I began to believe that the rebel picket-line had been withdrawn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.