I'm not the librarian or historian, I'm the web volunteer. I find this very interesting. Imagine making a mistake like the state one is in! When people today make such fopahs, I usually say "information overload" but it was a different world back then.

On an 1861 Martenet's map, I see a William Elliott at Wootton's Landing, just over the Patuxent River from Anne Arundel Co. which fits with his story.

In an internet search, I find William Elliott mention in the link below as a tobacco farmer with slaves, but no mention of Lucy.

There certainly are Elliotts still in Prince George's Co. Switchboard.com lists 10 in Upper Marlboro, so it seems likely that at least one might be related.

--Previous Message--
: Hello: During the Civil War, my great
: grandfather, Charles Westerfield was in
: Company F of the 8th Illinois Cavalry.  He
: was involved in several "scouts"
: into Prince Georges County.  I have his
: diary from 1864 in which he wrote the
: following:
: "Monday June 26, 1864. very warm but a
: little more comfortable than the three days
: preceeding [sic] it. went on patroll [sic]
: at night through prince George and Anna
: Runnun [sic] Counties went with Searjint
: [sic] Huntoon. stoped [sic] at Mount Zion
: about 12 at night and slept untill [sic]
: morning. we nearly scart [sic] a negro in to
: fits and another pleasant [word
: undecipherable] one viz promised a pretty
: Girl to remember her and if I return home
: safely (and she said she hoped I would) to
: write to her her [sic] address Miss Lucy
: Elliot, prince George Virginia. [sic] P.S. I
: must remember this. wonder if I will ever
: see her again.  
: "Tuesday June 28 1864. got breakfast
: at Mr. Elliots house, his daughter played
: the piano for us. and we spent a couple of
: hours very pleasantly. fed our horse and
: started on again and arrived at Arverrs
: Ville [sic] about four miles from Mount
: Zion. from there to Gales Ville [sic] which
: is on west river near the Herrings bay. got
: a lunch and came home got here about two
: oclock stood horse guard all night.  
: I am curious to know if there are any
: descendants of "Mr. Elliot" and
: "Miss Lucy Elliot" still living in
: the area? I'm rather glad nothing happened
: between these two post-war because I would
: not be here!  It is also interesting to
: conjure if Charles indeed tried to write
: Miss Elliot, but sent the letter to
: Virginia instead of Maryland, since that is
: the address he wrote in the diary?  If
: anyone can help, kindly drop a line to
: pwmay@widomaker.com. Thanks for any
: assistance.  Best wishes, Phil May    
: