"Many of these mystics, by following what they were taught by some treatises, secretly preserved from one generation to another, achieved discoveries which would not be despised even in our modern days of exact sciences. Roger Bacon, the friar, was laughed at as a quack, and is now generally numbered among "pretenders" to magic art; but his discoveries were nevertheless accepted, and are now used by those who ridicule him the most... Roger Bacon belonged by right if not by fact to that Brotherhood which includes all those who study the occult sciences. Living in the thirteenth century, almost a contemporary, therefore, of Albertus Magnus and Thomas Aquinas, his discoveries — such as gunpowder and optical glasses, and his mechanical achievements — were considered by everyone as so many miracles. He was accused of having made a compact with the Evil One... It is recounted, that, having been summoned before the king, the friar was induced to show "some of his skill before her majesty the queen. So he waved his hand... and "presently was heard such excellent music, that they all said they had never heard the like."... Then he waved his wand again,and suddenly there was such a smell "as if all the rich perfumes in the whole world had been there prepared in the best manner that art could set them out." Thephenomena of the mystic odors and music, exhibited by Roger Bacon, have been often observed in our own time."