Any attempt to throw fresh light on the meaning of the sixth book of the Nz'comadzean Bi/zz'es at once brings the inquirer face to face with the problem of the book's author ship. Such problems are not-often easy of solution, and this one is amongst the hardest of its class. There is indeed one circumstance that lessens the labour of the search in one direction, though it is at the cost of greatly increased difficulty in reaching a final answer to the whole question. It is not necessary, in order to discover whether this book is really Eudemian or Nicomachean, to know the relative frequency with which the words or phrases or small turns of thought that are found in it are found also in the undoubtedly Eude.
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