After having investigated numerous notes from the manuscripts and old books from the Principality of Moldova dated with the seventeenth and eighteenth centuries, it appears that they are true historical sources contributing to the discovery of our past. These notes can be considered authentic pages of chronicles, documents with narrative character. The authors of the notes were often themselves the witnesses of that they wrote or copied from other sources, they made notes of what they heard “for remembrance”. The thematic of the notes is quite diversified, there is information about the events which marked directly or indirectly the authors, about bad times, reign periods, the difficulties of war or military confrontations, the presence of foreign armies on the Principality of Moldova’ territory, devastations, fires, bad years, epidemics, daily operations etc. These notes are largely double checked by documentary sources or chronicles; they offer true information, supported by historical documents, sometimes new details unknown to history.