Steeped in their tradition, stern in their judgment, and stubborn in their undertakings, the horses of the Avoirdupois continue to build upon their great works, assembling one of the largest armies in the known world. It is uncertain which is stronger: their devotion to the old ways of chivalry, or their commitment to the religion of S'allumer. As both the church and the state grow in wealth and influence, it looks inevitable that eventually the two will be at odds for power but who would win? This supplement for the IRONCLAW Gaming System describes House Avoirdupois, from their first landings upon Calabria, to their conversion to the ways of Penitence, to their current state today. Included are details on their stratified society, from the ranks of the nobility to the orders of the Church. Also included are the secret ways of White Magic, which the Avoirdupois claim are the true forms of wizardly spells.