If you go this address you can do a word search for the sentences you provide. According to the page it is from History of Kershaw's Brigade by D. Augustus Dickert (Release Date: August 6, 2004). Hopefully this Ebook will show the source.

http://www.gutenberg.org/files/13124/13124-h/13124-h.htm

P.S. to all___ You can do a sentence search on google by simply placing the quotations marks " & " before and after the sentence. That makes searching for quotes easy and will also instantly show webmasters if their material is being published on other sites.