Anyone ever hear of "Camp Jewell"? Did he mean Mt. Vernon, Mo., instead of Vernon Co.?

(Enclosure)
General Order No. 1
Hdqrs. 1st Div., Army of the Frontier,
Camp Jewell, Vernon Co., Mo., April 26, 1863.
... Pursuant to orders from Major-General Herron, the undersigned assumes command of the First Division of the Army of the Frontier.
THOMAS EWING, Jr.,
Brigadier- General.

Jim