Letter from Captain Percival to his Aunt, Mrs Charles Drummond, dated Lisbon, 29 Sep 1810.
In this short letter Percival recounts an action fought near Coimbra, Portugal on 27 Sep 1810 (this appears to have been the Battle of Bussaco).
He recounts that the French were known to have lost two generals, one killed and one taken prisoner. 
From a collection of  twenty-three letters of written by Lt (later)   Capt George Harvey Percival, Coldstream Guards, to his aunt Mrs Charles Drummond in London from the Peninsula, 1810-1811 and the Low Countries, 1813-1814.