No one probably feels tempted to deny that our best authority for the text of the Tragedies is the Etruscus, E (Laurentianus 37.13), but the authority relatively due to the interpolated tradition A is still a matter of dispute. Leo indeed (vol. i. p. 4) professed to deny all authority to the evidence of A, even where E is manifestly corrupt. But we should be justified in doing this only if the interpolator of A had based his edition on the text of E, and the text of E had suffered no corruptions subsequent to the making of the A edition. That this is so there is not the least reason to suppose. Peiper therefore was right in requiring for his apparatus criticus an account of the pure A text, though neither he nor Richter took the trouble to search out the oldest and best MSS of the A tradition out of the three hundred or more available.