This equation was set up by Mr. Allen in the Classical Review XV. 8–9 (1901), and remained, as far as I know, for over twenty years without effect. I thought, therefore, when writing my External Evidence for Interpolation in Homer (Oxford: Clarendon Press, 1925) that the article had provided its own corrective and needed no criticism. About the same time, however, Mr. Allen in his Homer: The Origins and the Transmission (Oxford: Clarendon Press, 1924), 2352, reiterated his opinion; and later still Mr. Sheppard, ib. XLI. 127–9 (1927), shows that he has been impressed by it. Under these circumstances, and because a good deal depends upon the interpretation of the word, a brief discussion now seems desirable.