This description of Cambridge, University Library, MS Add. 1838 was written by Christopher Wright as part of the Polonsky Foundation Greek Manuscripts Project (2019-2021), a collaboration between the Universities of Cambridge and Heidelberg to conserve, catalogue and digitise the medieval and early modern Greek manuscripts held across Cambridge and those in the Bibliotheca Palatina, which is split between Heidelberg University Library and the Bibliotheca Apostolica Vaticana.