I cited it in my response, the subscription service:

American Civil War Research Database
http://www.civilwardata.com/active/index.html

You will find it in the:

Regimental Casualty Analysis

26th AL Infantry
Organized: on 3/27/62
Mustered Out: 4/9/65

#
Date
Place
Killed
Wounded
POW
Missing
1

0
1
4

2
 09/10/62Â
Boonsboro, MD
  0 Â
  1 Â
  0 Â
  0 Â
Etc, Etc.
162, last

Sources used by Historical Data Systems, Inc.:
- The Virginia Regimental Histories Series

[http://www.civilwardata.com/active/hdsquery.dll?RegimentCasualty?780&C&1&63&20]