The article offers a description of the composite East Syriac manuscript preserved in Alqosh (Northern Iraq). Two originally independent parts of the manuscript contain works dealing for the most part with philosophy, logic, grammar and lexicography and were produced in 19th century Alqosh. Whereas the exemplar of one of these can be determined with certainty (British Library, India Office 9), that of the second part is more elusive. This previously unknown manuscript not only provides new textual evidence for a large number of texts, but is also of significant historical importance as a document attesting to the revival of interest in the study of philosophy and grammar in the Chaldean milieu during the modern period