Well, Mister President, with all due deference to you, I don't believe in natural-born generals except where they have had proper military training, and it seems to me the siege of Vicksburg is too important a matter to trust to anybody except a scientific military man; besides, if you take troops from Grant and Sherman to give them to McClernand, you will weaken the army.
p. 123 - Incidents and Anecdotes of the Civil War (1885)