Egerton Smith Castle F.S.A. was an author and antiquarian with a distinguished career spanning multiple fields. He was an accomplished swordsman and an early practitioner of reconstructed historical fencing, a discipline focused on reviving and studying combat techniques from historical periods. Castle frequently collaborated with Captain Alfred Hutton in this work, establishing himself as a notable figure in the development of historical fencing as both a scholarly and practical pursuit. Castle's athletic achievements extended to competitive fencing at the highest levels. He served as captain of the British épée and sabre teams at the 1908 Summer Olympics, demonstrating his expertise and standing in the sport during the early modern Olympic era.