The signature of Frank E. Kelley is a mystery

Graffiti Image 7:

The signature of Frank E. Kelley is a mystery. Frank did not include a reference to a military unit, and considering that Kelley is a common name within both Northern and Southern armies, Frank may never be positively identified. However, there is a Frank E. Kelley found within the rosters of both the 35th Virginia Calvary and the Massachusetts 3rd Light Artillery—both of which units had signatories to the Graffiti House walls.