Presumably you have seen a letter written by Chaplain Owen to Mrs. W. H. Battle from the General Hospital in Gettysburg on 30 August 1863. It is a condolence letter concerning the death of her son, Wesley Lewis Battle. The University of North Carolina's blog, Civil War Day by Day (blogs.lib.unc.edu/civilwar) lists the letter under the 14 September 1863 entry. It is part of the Battle Family Papers at the UNC's Wilson Library.