The town is “Fort Mitchell” - with two letter L's.
The Fort, and the Fort's namesake, have one L

“The Stringtown Pike: Fort Mitchel Crumbles on the Heights”
That's the caption on the back of this image, provided  thru the courtesy of the Lloyd Library in Cincinnati.

 

The Defences [sic] of Kentucky  Fort Mitchel, on the Lexington Turnpike, 
Covington, Ky, opposite Cincinnati  The 104th Regiment Ohio Volunteers, Col. Vroom, 
occupying the rifle-pits, and awaiting an  attack from the rebels, September 11. 1862

Harper's ran a description of the above scene,  here

 

Harvey, the Official Dog of the 104th.
From a Facebook post by the Behringer-Crawford Museum

 

Fort Mitchel, 1862

 

Fort Mitchel, as sketched by Alfred E. Mathews of the 31st Regiment Ohio Volunteers. The sketch was turned into a lithograph by the Middleton, Strobridge & Company in Cincinnati.

 

Fort Mitchel, at Fort Mitchell.  These old line drawings tend to be reasonably accurate.

 

General Ormsby MacKnight Mitchel.
Biographical info on the General is here.

His claim to fame was not as a general, but an astronomer, and public speaker.