  We analyze in some detail the course of Theoretical Physics held by Ettore
Majorana at the University of Naples in 1938, just before his mysterious
disappearance. In particular we give an account of the recently retrieved
"Moreno Paper", where the lecture notes are reported. Six of these lectures are
not present in the collection of the original manuscripts deposited at the
Domus Galilaeana in Pisa, consisting of only ten lectures.
