On the origin questian of Lews piece, I {I think.

} Interestingly seem to recall from Eggerton that the Kabul Armouries were often staffed by Sikhs weapon smiths from the Punjab or some such?
{Havent got a copy to hand so cant quote exactly & could be mistaken perhaps? Not read it for 10 or so years.}
Just a little bit more grist to the mill!
Spiral