One, a proper anatomical study on Ponies, with a slight bias towards Mares. Nothing saucy, proper anatomical explanations, the whole lot. Diagrams, charts, what part is named what. They were pretty similar to Horses, actually; Barnon checking on his Holo TV, having the Flickipedia page for them pulled up. Hooves, Withers; though apparently, some Ponies had Wings, and some had Horns. A few even had both. Funky stuff.