whenever I see that picture of Farquarson sitting on the park bench with his sister, I always seem to need a second look just to make sure which one is the sister. According to Ivo, cutting/grinding into u. glass is a definitely a no no, but they may not have worried so much back in the 50s.
Irene Stevens did an almost identical frond for W.C., but it was straight and lifeless, unlike these which look to articulate. Well you're lucky Keith, it's a gorgeous piece - congrats.