From A. Brierre de Boismont, On Hallucinations (1855):—
This writer relates the case of an English ambassador, who was sent on a political mission to one of the Indian kings. On his arrival at the palace of the sovereign, he was conducted through a long suite of magnificent apartments, lined by officers of state clad in the richest apparel; he was then led into a small chamber, where the furniture and decorations were of a still more costly description than what he had already seen.
There he was left by himself. In a short time two persons of high rank entered, preceding a litter borne by slaves, and covered with rich silks and cashmere shawls of great value. On the couch was stretched a human form, which he should have mistaken for a corpse but for the motion of the head, which corresponded to that of the bearers; two of the officers in attendance had in their hands a golden waiter, on each of which was a cup, and a small bottle containing a bluish-looking liquid.