http://agathe.gr/publications/picture_books.html
Picture Books The Athenian Agora Picture Book series, started in 1951, aims to make information about life in the ancient commercial and political center of Athens available to a wide audience. Each booklet ... Some of the birds most often depicted are imaginary—from the griffin to the “phallos bird,” whose head and neck consisted of an erect penis. ... Bridles and other horse trappings are often found in graves, alongside vases depicting horses grazing, racing, and parading. ... As well as presenting many examples of horse imagery found in the Agora, the author reports on recent finds near the ancient hipparcheion, the stables of the Athenian cavalry.