According to London Tit-Bits, "De Heiterkeit had the honor of exhibiting before Louis XIV., the Emperor of Austria, the King of Sicily and the Doge of Venice, and his name having reached the Inquisition, that holy office proposed experimenting on him to find out whether he was fireproof externally as well as internally. He was preserved from this unwelcome ordeal, however, by the interference of the Duchess Royal, Regent of Savoy."
His programme did not differ materially from that of his predecessor, Richardson, who had antedated him by nearly fifty years.
By far the most famous of the early fire-eaters was Robert Powell, whose public career extended over a period of nearly sixty years, and who was patronized by the English peerage. It was mainly through the instrumentality of Sir Hans Sloane that, in 1751, the Royal Society presented Powell a purse of gold and a large silver medal.
Lounger's Commonplace Book says of Powell: "Such is his passion for this terrible element, that if he were to come hungry into your kitchen, while a sirloin was roasting, he would eat up the fire and leave the beef. It is somewhat surprising that the friends of REAL MERIT have not yet promoted him, living as we do in an age favorable to men of genius. Obliged to wander from place to place, instead of indulging himself in private with his favorite dish, he is under the uncomfortable necessity of eating in public, and helping himself from the kitchen fire of some paltry ale-house in the country."
His advertisements show that he was before the public from 1718 to 1780. One of his later advertisements runs as follows:
SUM SOLUS
Please observe that there are two different performances the same evening, which will be performed by the famous
MR. POWELL, FIRE-EATER, FROM LONDON:
who has had the honor to exhibit, with universal applause, the most surprising performances that were ever attempted by mankind, before His Royal Highness William, late Duke of Cumberland, at Windsor Lodge, May 7th, 1752; before His Royal Highness the Duke of Gloucester, at Gloucester House, January 30th, 1769; before His Royal Highness the present Duke of Cumberland, at Windsor Lodge, September 25th, 1769; before Sir Hans Sloane and several of the Royal Society, March 4th, 1751, who made Mr. Powell a compliment of a purse of gold, and a fine large silver medal, which the curious may view by applying to him; and before most of the Nobility and Quality in the Kingdom.
He intends to sup on the following articles: 1. He eats red-hot coals out of the fire as natural as bread. 2. He licks with his naked tongue red-hot tobacco pipes, flaming with brimstone. 3. He takes a large bunch of deal matches, lights them altogether; and holds them in his mouth till the flame is extinguished. 4. He takes a red-hot heater out of the fire, licks it with his naked tongue several times, and carries it around the room between his teeth. 5. He fills his mouth with red-hot charcoal, and broils a slice of beef or mutton upon his tongue, and any person may blow the fire with a pair of bellows at the same time. 6. He takes a quantity of resin, pitch, bees'-wax, sealing-wax, brimstone, alum, and lead, melts them all together over a chafing-dish of coals, and eats the same combustibles with a spoon, as if it were a porringer of broth (which he calls his dish of soup), to the great and agreeable surprise of the spectators; with various other extraordinary performances never attempted by any other person of this age, and there is scarce a possibility ever will; so that those who neglect this opportunity of seeing the wonders performed by this artist, will lose the sight of the most amazing exhibition ever done by man.
The doors to be opened by six and he sups precisely at seven o'clock, without any notice given by sound of trumpet.
If gentry do not choose to come at seven o'clock, no performance.
Prices of admission to ladies and gentlemen, one shilling. Back Seats for Children and Servants, six pence.