But, indeed, he replied, I cannot tell you. I only know that there are some three principles of rhythm out of which metrical systems are framed, just as in sounds there are four notes (i.e. the four notes of the tetrachord.) out of which all the harmonies are composed; that is an observation which I have made. But of what sort of lives they are severally the imitations I am unable to say.

Then, I said, we must take Damon into our counsels; and he will tell us what rhythms are expressive of meanness, or insolence, or fury, or other unworthiness, and what are to be reserved for the expression of opposite feelings. And I think that I have an indistinct recollection of his mentioning a complex Cretic rhythm; also a dactylic or heroic, and he arranged them in some manner which I do not quite understand, making the