These are lectures on morality, attributed to Durkheim by Raymond Lenoir and given to Steven Lukes, who reproduced them in his doctoral thesis on Durkheim. They are published, here, together and in full for the first time. The first group of lectures covers the family, as well as general issues in morality and moral education. The second group of lectures, on civic ethics, covers citizenship, democracy, the state, occupational groups, law, and the idea of la patrie. The lectures conclude with a familiar discussion of discipline, and a more original discussion of duties to oneself. The editorial introduction to the lectures explains the circumstances in which they came to light, and discusses issues of authenticity but also of the general role, in Durkheimian studies, of texts variously attributed to Durkheim or based on notes by his students.