The Hancock-Henderson Quill, Inc.
History of 10th Illinois Infantry (continued).
When six regiments had reported at Cairo, Col. Prentiss was elected and commissioned brigadier-general and took command of this, the first brigade in Illinois volunteers with headquarters there.
The 10th was composed of seven companies of infantry and three of artillery. The term was taken up with guard duty, drilling and forays into Kentucky and Missouri to break up Rebel camps. News of the Battle of Bull Run was received just at the expiration of service (the North thought the war would be over in a matter of weeks before being defeated at Bull Run) and that beloved officer, Lieut-Col. James D. Morgan asked the 10th if they would remain and go to Washington if needed.
They gave unanimous and enthusiastic consent. The regiment was mustered out July 25th.
1882 History of Henderson County