Glenn Hughes On A Deep Purple Mk III Reunion: "No One At 'Castle Blackmore' Opened The Door"Glenn Hughes tells CBS Local that "Jon, David and I were trying to get it together." The roadblock was the band's famously mercurial guitarist: "We couldn’t get ahold of him. We sent carrier pigeons, and the Pony Express. But nobody at 'Castle Blackmore' answered the door. It wasn’t meant to be."