Frederick William III - King of Prussia - letter from 1798 - original signed For Sale

original, handwritten letter in French, good condition, see scans for conditionof Frederick William III - (1797 to 1840) King of Prussia and Elector of Brandenburg (until 1809)approx. 18.5 x 23 cm (double) - folded twiceScan No. 1 shows page 1 with the handwritten textScan 2 + 3 shows the complete letteroriginal signed with its title in French \"Frederic Guillaume\"
Text: \"I have received your letter dated the 19th of the ?? month received and tell you that on the occasion of the swearing-in, I have wholeheartedly sworn in to the loyalty and homage of the ???? their title of your family.... Therefore, I ask God to show you His grace and grant divine protection.Berlin, 24.5.1798 Frederic Guillaume\"