What Gallows
A specialised trade publication which is no doubt one of those limited-print "subscription only" magazines distributed among industry insiders. It would apear to be too specialised and technical an interest to sell to the general public, although, as this is Ankh-Morpork, you never know...An avid reader is Daniel "One Drop" Trooper, Ankh-Morpork's principal city executioner and a craftsman at his trade.