In the mid-19th Century PD, he and his partner, Gerlach, were part of an eleven-person team sent to New Denver on Earth with the goal of assassinating Beowulfan representative and anti-slavery lobbyist Aurèle Fairmont-Solbakken. The attempt was foiled by the Biological Survey Corps, and only Ardmore managed to escape alive.
Three years later, he was teamed up with Tobin Manischewitz to work undercover on Beowulf, disguising themselves as licensed employees of Black Mountain Security. After they kidnapped Allison Benton-Ramirez y Chou, Ardmore tortured her with a neural whip, taking a lot of personal pleasure from the act. Alfred Harrington breached the Mesans' compound to free her, and upon seeing what Ardmore had done to her, killed him by crushing his skull with the butt of his rifle. (HHA6.3: BATB)