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These are ancient testimonia about Eurytus, a Pythagorean philosopher of southern Italy active around 400 BC and a pupil of Philolaus. No writings by him survive. The testimonia come from Iamblichus' Life of Pythagoras, which tells a story about Philolaus' voice heard from his tomb, from Theophrastus, citing Archytas, and from Aristotle, who describe how Eurytus used pebbles to fix the number of a man or a horse.
These brief reports are the main evidence for one of the most literal forms of the Pythagorean doctrine that things are numbers. Aristotle and Theophrastus used Eurytus as an example of how far the theory could be pushed, and the passages remain central to the study of early Pythagorean thought.
About this edition. The Greek text comes from the Eulogikon open corpus of public-domain editions (standard reference: DK 45 A 1–3). Every word has been analyzed with odyCy, a neural language model for Ancient Greek — click or tap any word for its dictionary form, part of speech, and complete morphology, together with the full entry from the Liddell–Scott–Jones Greek–English Lexicon (LSJ).