1. He was one of the three contributors to Collectanea Topographica et Genealogica. 2. Such documents were among those included in his " Collectanea ". 3. These were published in 1815 under the title " Collectanea litteraria ". 4. He left a hundred volumes of manuscript collectanea for the completion of his work. 5. He also left " Collectanea mathematica praeprimis gnomonicam spectania, " 151 f. 6. Morton continued to write, lecture, and answer inquiries at the Collectanea even after retiring. 7. He left several works, but only the " collectanea " to the Pentateuch have been published. 8. Collectanea Mathematica is indexed in Current Contents ( Physical Chemical and Earth Sciences ) and MathSciNet, and Zentralblatt MATH9. They are embodied in the first volume of his " Collectanea Monumentorum Veterum Ecclesi?Gr�c?ac Latin?." 10. His ethical will and some collectanea are printed in the work of his grandson, Aaron ben Asher of Karlin.