ALS ("Ferdinand Maximilian von Österreich").
4to. 1 p. on bifolium. Includes an envelope addressed by a scribe's hand.
Fine letter by the then 14-year-old Archduke Ferdinand Maximilian of Austria to Carl Freiherr von Schwartzenau, colonel and commander of the "Archduke Ferdinand Max 3rd Chevaux-Leger Regiment": "It is a great pleasure for me that such a nice regiment bears my name and has in every instance proved itself through courage and bravery, and I shall always endeavor to advance the welfare of the same to the best of my abilities. I thank you for your so kindly sending me the list of officers and their ranks [...]".
A small bit torn out from the blank counter-leaf.