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, October 12, 1742. Letter to General Dusenberg. In part, 'I am well comforted to see...that you have arrived at Berlin. You need to do nothing until my arrival there. I will speak with you before you are off to your regiment.' In fine condition, with a bit of light toning. RRAuction COA.