I checked more records for officers of Company E.

Company E
Capt T T Howze Company Commander Resigned - Oct 1862
Geo M. Massingale

Capt Thos Howze (age 43) tendered his resignation in a letter dated July 1862 at Columbus. The reason was due to his health; a problem with his liver and something involving getting kicked by a mule.

1st Lt Geo M Massengale (age 32) was absent without leave in Sept 1862 and then in Dec he was Captain of the Company.
He signed a requisition form for Oct 62 to Jan 63 but it does not note a location.
He was among those taken prisoner at Vicksburg.

I hoped that I would find a record in an officer's file that would say where they were in Sept-Oct 1862.