The Lord's Mail, Armor of Morihaus is a unique Mithril Plate Cuirass in The Elder Scrolls II: Daggerfall. The cuirass had once been wielded by Morihaus, and then again by the Eternal Champion, but has since disappeared.
The Lord's Mail can be found by the Hero of Daggerfall after they have assisted a Witch, hidden within a dungeon.
The Hero of Daggerfall, having joined one of the Knight Orders that serve Illiac Bay, will be given the opportunity to find an Artifact of Power by one of their quest givers. The Hero is instructed to find a Witch inside one of Daggerfall's dungeons. She will tell the Hero of the cuirass' location after they have kidnapped her great-granddaughter for her. The Hero will then be told the uirass is inside another dungeon, scattered among some other equipment.