Second king of Prussia and one of the greatest of the 18th century monarchs; an extremely capable soldier who nearly doubled his country's area by the end of his reign, he also encouraged arts and commerce, and rebuilt the economy after the Seven Years War. LS in French, signed 'Frederic,' one page, 7.5 x 9.5, August 23, 1782. Letter of instruction sent to a Lieutenant Colonel. In part, 'I am willing to show you my will, but I cannot meet your request as per your letter from the 19th of the month, to take part at your Camp of Dattlern. I made the decision not to permit any foreigners to enter the Camp.' In fine condition, with show through from tape reinforcement on reverse, located well under all text and some scattered light toning. RRAuction COA.