The Boar-Headed Corpse in the House of Gems

From D5.31, Iskandar Sees Wonders and Omens. It illustrates D5.31.8–16:

D5.31.8
Beside the spring two golden seats were spread;Upon them lay a luckless figure, dead.
D5.31.9
A silent corpse lay stretched upon the gold:A human body with a boar’s head, cold.
D5.31.10
His couch was camphor, cool as winter’s night,Beneath a brocade mantle, rich and bright.
D5.31.11
Whoever went to take a thing away,Or trod the ground on which that body lay,
D5.31.12
Would shake until his strength was overthrown,And die in trembling on that fatal stone.
D5.31.13
A sudden cry rose from the salty deep: “O soul of endless greed, no longer sweep
D5.31.14
Across the earth! Draw rein, your wandering cease; The hour draws near that robs your crown of peace.
D5.31.15
Your span of life is short; the end draws near;Your royal throne shall lack its monarch here.”
D5.31.16
Iskandar quailed and wheeled his horse in dread,And came like smoke to camp, nor stayed, but sped.