The two-fingered release is probably the earliest documented method of string-drawing. It has been described in use by early Eskimo bow-hunters and going back into antiquity, it appears in Sassanian royal pictures. The Sassanid Empire or Sasanian Empire, known to its inhabitants as Ērānshahr, was the last pre-Islamic Persian Empire, ruled by the Sasanian Dynasty from AD224 to 651.The Sassanid Empire was recognized as one of the two main powers in Western Asia and Europe alongside the Roman Empire and later the Byzantine Empire for a period of more than 400 years.
This release method is also recorded in the Bayeux Tapestry circ AD 1067, depicting the 'Norman Conquest' of England. There are so many medieval depictions of this manner of shooting, that it has been generally accepted to have been the 'standard' loose method in medieval archery, made notorious by the French after the battles of Poitier, Crecy & Agincourt where captured English archers would have their 2 drawing fingers cut off to prevent them shooting again. The English archers took to defiantly waving their 2 drawing fingers at the French army and this has continued today in the much used 'V' hand gesture. So if you shoot 2-finger split, you can be proud, you have a hell of a lot of history behind you!