Perhaps my greatest debt has been to the excellent volume entitled _Greek Athletic Sports and Festivals_, by E. Norman Gardiner, M. A., a scholar whose practical knowledge of modern athletic sports and wide familiarity with the ancient source material, both literary and monumental, has well fitted him to deal afresh with the subject treated so learnedly over three quarters of a century ago in Krause’s _Die Gymnastik und Agonistik der Hellenen_. I have also constantly drawn upon Gardiner’s collection of vase-paintings which illustrate athletic scenes. I should also note here several other works which have been of great assistance in writing this book, such as Juethner’s _Ueber antike Turngeraethe_ and edition of Philostratos’ _de Arte gymnastica_, Reisch’s _Griechische Weihgeschenke_, Rouse’s _Greek Votive Offerings_, and Foerster’s _Die Sieger in den Olympischen Spielen_. The chronological list of victors in the latter compilation was, in large part, the foundation of my earlier work _de olympionicarum Statuis_. I have also received most valuable help from the standard catalogues of modern museums, _e. g._, those by Amelung, Dickins, Helbig, Kabbadias, Lechat, Richter, de Ridder, Staïs, Svoronos, and especially the admirable ones of the classical collections in the British Museum. I regret that, owing to the recent war, some of the latest catalogues, those especially of the smaller foreign museums, have not been available. For illustrative matter, I have made no effort to reproduce merely striking works of art, but have, for the most part, presented well-known works which readily illustrate the problems treated in the text. I have availed myself of collections of photographs kindly placed at my disposal by Professors Herbert E. Everett of the School of Fine Arts of the University of Pennsylvania, D. M. Robinson of the Johns Hopkins University, A. S. Cooley of the Moravian College at Bethlehem, Pennsylvania, and Dr. Mary H. Swindler of Bryn Mawr College. The various collections of plates and the books and journals from which I have taken illustrations are duly noted in the List of Illustrations.