The scale which is formed by the notes of the fragment agrees, so far as it extends, with two of the scales now in question, viz. the Phrygian and the Dorian. Taking the view of its tonality expressed in the last chapter (p. 93), we should describe it as the Dorian scale of Aristides with the two highest notes omitted. The omission, in so short a fragment, is of little weight; and the agreement in the use of an additional lower note (Hyper-hypatê) is certainly worth notice. On the other hand, the Dorian is precisely the mode, of those given in the list of Aristides, which least needs defence, as it is the most faithful copy of the Perfect System. Hence the fact that it is verified by an actual piece of music does not go far in support of the other scales in the same list. If our suspicions are well-founded, it is evident that they seriously affect the genuineness of all the antiquarian learning which Aristides sets before his readers, and in particular of his account of the Platonic modes. I venture to think that they go far to deprive that account of the value which it has been supposed to have for the history of the earliest Greek music. For the later period, however, to which Aristides himself belongs, these apocryphal scales are a document of some importance. The fact that they do not agree entirely with the species of the Octave as given by the pseudo-Euclid leads us to think that they may be influenced by scales used in actual music. This applies especially to the Phrygian, which (as has been shown) is really diatonic. The Ionian, again, is perhaps merely an imperfect form of the same scale, viz. the octave _d-d_ with lower _d_ omitted. And the Syntono-lydian may be the Lydian diatonic octave _c-c_ with a similar omission of the lower _c_. § 35. _Evidence for Scales of different species._ The object of the foregoing discussion has been to show, in the first place, that there was no such distinction in ancient Greek music as that which scholars have drawn between Modes ([Greek: harmoniai]) and Keys ([Greek: tonoi] or [Greek: tropoi]): and, in the second place, that the musical scales denoted by these terms were primarily distinguished by difference of _pitch_,--that in fact they were so many keys of the standard scale known in its final form as the Perfect System. The evidence now brought forward in support of these two propositions is surely as complete as that which has been allowed to determine any question of ancient learning.