to avenge his fall?

It was some time before Frank could get an opportunity to use his musket;
for if he exposed the smallest portion of his body, it was the signal for
his watchful enemies, who sent the bullets about him in unpleasant
proximity. In spite of his dangerous situation, he could not help thinking
that the rebels were very proficient in "Indian fighting," for, with all
his watchfulness, he could not get an opportunity to put in a shot. All he
could see of his enemies would be, first, a rifle thrust carefully over
the levee, then a very small portion of a head would appear, and the
bullet would come straight to the mark.

In the mean time the Milwaukee was working her way out into the stream,
and the rebels, finding that their fire was not returned, grew bolder by
degrees, and became less careful to conceal themselves. This was what
Frank wanted; but he reserved his fire until a tall rebel rose to his full
hight from behind the levee, fired his gun, and stood watching the effect
of the shot. Frank's musket was at his shoulder in an instant, his finger
pressed the trigger, and the rebel staggered for a moment, and disappeared
behind the levee.

"There," said Frank to himself, "that's what Simpson would call 'squaring
the yards.' I'm even with the rascals now."

The rebels answered the shot with load yells, and their bullets fell
thicker than ever; but the Milwaukee was almost out of range, and, in a
few moments, the firing ceased altogether.