Prof. H. I. Marrou has recently discussed the technique of editing. Though the testimonies, adduced by him, mainly concern the Christian Fathers, he also speaks about the editions of classical authors (Marrou 1.1.222-4). I should like to make a few observations here, because Prof. M. hopes that the testimonies of the classical authors will be studied anew in the light of the evidence adduced by him. If I understand Prof. M. well, he is inclined to think that the part played by the bibliopola in the publication of a book, was negligible. He rather supposes that the author followed other ways and chose an influential friend as a depositary of the principal copy, from which other copies might be made. This view seems, in fact, to be confirmed by the testimony of Augustine who had a book published by means of the deacon Firmus (cf. Marrou .11.). Since this testimony is incontrovertible, I can understand Prof. M. to have been influenced by it. However, I do not think that it can be generalised. In this connection, I draw attention to Martial, whose enuncia tions, if properly explained, are convincing. As we know, the books of Martial's Epigrams were originally published successively and separately. We may begin with the first book, where we may single uot the opening poem (I 2) and the last but one (I 117). In I 2 Martial expressly informs the reader that the book can be got from a book-seller Secundus, 2 while also in I 117 Martial refers an acquaintance Lupercus, who tries to borrow the book, to a book-seller, Atrectus. We see that in two important places of the book, viz. the beginning and the end, Martial draws the attention to the librarian, let us say the publisher. In the opening poem, he recommends the edition in membrana, which is the popular and