" Volume 1 ; Dialectica...; s.l.s.d. , manuscript on paper, in-4°, 20 x15,8 cm, 243 pp, bound in contemporary mottled calf, title label on spine (partly missing), binding with some defects. Interior fine, written in ink with many abbreviations. The manuscript is preceded by a 3 page '' Parva Tabula Abbreviationem''. (This volume is offered here because we presume it goes together with the following two vols). Volume 2 ; Logica et Methaphisica domini ulens trudonensis. S.l. ( Leuven ?), May 29 1757 (in fine), manuscript on paper, in-4°, 20 x15,8 cm, 625 pp, bound in contemporary mottled calf, title label on decorated spine, binding with some defects. Volume 3 ; Pars 3tia. Philosophia seu Phisica. S.l. ( Leuven ?), June 25 1755 (in fine), manuscript on paper, in-4°, 20 x15,8 cm, 715 pp, bound in contemporary mottled calf, title label on decorated spine, binding with defects. The three manuscripts are entirely written in Latin. From the context we gather that the three manuscripts were used ( and most probably also written) by a student called Ulens from the city of Sint-Truiden, studying at Leuven University 1755-1757. The three vols all written on identical paper ; each leaf has a blindstamped frame consisting of two fillets which define the space to be written. In the introduction of vol.II the names of the philosophers whom are to be studied are explicitly listed; 1.Thomas Aquino , 2 Duns Scotus , 3.Ockham. Descartes , Petrus Gassendi , Newton. Volume III (Physics) contains neatly drawn illustrations of e.g. the planetary system, lunar phases etc."