On the first days of July 1862,
immediately after the writing and publication of his work on the several senses of being in Aristotle, Brentano sent a copy of the volume, and the request to obtain the doctorate in absentia, to the Dean of the faculty of philosophy in the University of Tübingen. A letter followed the dispatch of the volume from Josef Merkel, on 13 July 1862, to Professor Wilhelm Sigismund Teuffel (1820-1878), of the same University. In this letter, Merkel said, “the young Br[entano], (a son of the well-known Bettina von Arnim’s brother, nephew of the poet Clemens Brentano) has shown in this work such a dialectical acumen, such a thoughtfulness in the consideration of every aspect and such a profound seriousness that, if I’m not wrong [ni fallor], there would not be many Inaugural Dissertations of this value that may come out. From this praise, maybe quite interested, you can see that I take interest in this matter […] It seems that Professor Trendelenburg, who sent the fifth edition of his Elementa Logices Aristotelea, just published, to young Brentano, has been delighted by the thoroughness of his former student”