Aristotle's Ethica Eudemia (Eth. Eud.) and Ethica Nicomachea (Eth. Nic.), as is well known and much discussed, contain three books in common (Eth. Eud. 4–6 = Eth. Nic. 5–7). Less well known, at least until Dieter Harlfinger alerted scholars to the fact in 1971, is that some of the manuscripts of Eth. Eud. do, contrary to the then prevailing consensus, contain the text of these common books. Even less well known is that Harlfinger's discovery was anticipated some 50 years before by Walter Ashburner, who had uncovered this fact about Eth. Eud. MSS in the Laurentian library of Florence. Ashburner's anticipation of Harlfinger, however, is not the real value of his article. Its value rather is that it contains collations of readings for the common books, and thereby gives us an excellent resource for examining the text of the common books as this text is contained in exclusively Eth. Eud. MSS. The Eth. Eud. tradition of the common books has hitherto received little attention. Modern editions of Eth. Eud. do not include these books, and editions of Eth. Nic. have other MSS for the purpose. Ashburner's collations are the more valuable because they are taken from (among others) the one MS that, in Harlfinger's learned stemma, appears as the archetype for all the rest.