The fifth and sixth volumes of Dr Shackleton Bailey's edition of the Atticus letters contain a revised version of the text first published in the Oxford Classical Texts in 1961. Problems of dating in this part of the correspondence are severe, and prolonged study of them has caused Dr Shackleton Bailey to depart on occasions from the traditional chronology. Like their predecessors, these two volumes contain a text and selective apparatus, a translation facing each page of text, a full commentary, and indexes.