Persian arrow construction

[Dan D'Silva]

Hello,

Is there any archaeological or literary evidence about what the Persians, or anyone else in the area during the Classical period, used to attach fletchings and keep the reed shafts from splitting below the arrowhead?  I'd always assumed it was sinew sealed with pitch, but when I started investigating how to use pitch, it occurred to me that I'd only made these assumptions because these are what modern "primitive" archers prefer.

The sinew does work very nicely -- it's what I used on bamboo shafts in 2015, but I sealed them with epoxy, which went on thick and ugly, because I was in a hurry just before departing for Greece, and now I'm in the process of reconstructing them.