The author examines again the problem of the composition and of the original structure of Marc. gr. 269 concerning the Corpus Hippocraticum. She proposes to date the manuscript back to the X cent. and to attribute the copy to only one scribe. She acknowledges an old restoration. She attributes the index to the XII cent. and shows that it is not connected with the manuscript, which, in the first place, contained only the works we are able to read at the present time.