Serene Prince, Gracious Lord,
Since Her Holy Majesty, the much wise Queen of Sweden, in accordance with her kindness and benevolence towards men of litterature has condescended to accept some results of my labours from my humble person, I would find it improper to ignore someone, who also often has had the fortune of Sweden in his hands and also has shown the same benevolence and grace towards those who support the good arts. Thus, as I have published a work about music this year and dedicated it to all the great men of this world, neither would nor should I ignore Your Graceful Highness, as You belong to them. Thus I also trust that it will be recieved by You with the same benevolence as it is presented by its author. And if I am to find out that it has found grace before the serene eyes of Your Highness, I will spare no effort to reveal more such secrets of Nature, hopefully not unworthy Your inquiring mind. Meanwhile I pray devotedly to God, the Great and Almighty, that He will provide Your Highness with abundant eternal riches, at the same time as I, with my mind full of humble devotion, pray that He will take me and my religion under His protection whenever occasion is given, and that He will not cease to support it. Farewell, Gracious Prince, Glory of the Warriors, Generous Mecaenas of the Written Word.
Rome February 28 in the Year of Jubilee 1650
Your Highnesses most humble servant