Book B/iii consists of the minimal critical notes necessary to justify (or question) the authenticity of the fragments and defend the readings adopted in book B/i and appeals for that purpose to the data contained in the apparatuses of books B/i andf B/ii. This book offers a rich bibliography, a full glossary of Heraclitus' vocabulary, an alphabetical index of all the passages referred to in Apparatus I and in the Annex, and a numeric concordance with the texts of the sources published in Traditio (A).