The pursuit was continued until after dark.

The battle of Champion's Hill lasted about four hours, hard fighting,
preceded by two or three hours of skirmishing, some of which almost rose
to the dignity of battle. Every man of Hovey's division and of
McPherson's two divisions was engaged during the battle. No other part
of my command was engaged at all, except that as described before.
Osterhaus's and A. J. Smith's divisions had encountered the rebel
advanced pickets as early as half-past seven. Their positions were
admirable for advancing upon the enemy's line. McClernand, with two
divisions, was within a few miles of the battle-field long before noon
and in easy hearing. I sent him repeated orders by staff officers fully
competent to explain to him the situation. These traversed the wood
separating us, without escort, and directed him to push forward; but he
did not come. It is true, in front of McClernand there was a small
force of the enemy and posted in a good position behind a ravine
obstructing his advance; but if he had moved to the right by the road my
staff officers had followed the enemy must either have fallen back or
been cut off. Instead of this he sent orders to Hovey, who belonged to
his corps, to join on to his right flank. Hovey was bearing the brunt
of the battle at the time. To obey the order he would have had to pull
out from the front of the enemy and march back as far as McClernand had
to advance to get into battle and substantially over the same ground.
Of course I did not permit Hovey to obey the order of his intermediate
superior.

We had in this battle about 15,000 men absolutely engaged. This
excludes those that did not get up, all of McClernand's command except
Hovey. Our loss was 410 killed, 1,844 wounded and 187 missing. Hovey
alone lost 1,200 killed, wounded and missing--more than one-third of his