Richard B. Irwin, History of the Nineteenth Army Corps
“ On the 21st of October he sent Major-General John A. McClernand to Indiana, Illinois, and Iowa, with confidential orders, authorizing him to raise troops for an expedition, under his command, to move against Vicksburg from Cairo or Memphis as a place of rendezvous, and "to clear the Mississippi River and open navigation to New Orleans." Perhaps because of the confidence still felt in Grant by the President himself, although within narrowing limits, Grant was not to share the fate of McClellan, of Buell, and of so many others. ”
