Consideratio & observatio cometae aetherei astronomica qui anno MDLXXX mensibus octobri, novembri et decembri in alto aethere apparvit

Your Highness, that for your singular and customary clemency toward me (which I have experienced through so many and such great documents and benefits conferred upon me that I seem to have jumped over the limits of modesty too much if I dare to ask for anything more), you might bear that long delay with an equal and most clement mind, since I am without blame, and accept with the same clemency this slight writing, which I now finally offer to Your Highness, just as I had decided at the beginning, though not yet adorned as I wanted and as would be fitting. If I should be made partaker of this prayer, I will labor with all my might so that no one can say that I have been lacking in any part of my duty, but that I have faithfully performed the things demanded and entrusted to me. May God, the Father of our Savior, preserve Your Highness for the Church and Schools and the whole country, safe for a very long time, and may He grant and govern the salutary counsels of Your Highness and other pious princes, especially the Most Illustrious Prince and Lord, D. Ludwig, Count Palatine, Elector etc., my Most Clement Lord, so that just as it has begun, the true Church of God can live peacefully and tranquilly in these lands under the shadows of its wings, until finally, this curriculum and race having been completed, we may be able to enjoy and partake of eternal peace in the heavens. Finally, I humbly commend myself to the most clement patronage of Your Highness. Done at Heidelberg, 9 March, in the year 1581.