The following is a charming anecdote related by Herrmann in the _North American Review_, some years ago: [Illustration: ALEXANDER HERRMANN AT THE AGE OF 23.] “In March, 1885, while in Madrid, I appeared at the Sasuella Theatre quite successfully, for the house was filled every evening with hidalgos and noble senoras, and King Alphonso XII. was kind enough to view my performance from a box. He was so pleased that I was asked to the palace, and knowing him to be a great sportsman, I presented him with a silver-mounted saddle which I had brought with me from Buenos Ayres. He was exceedingly kind, and after I had performed a mathematical trick with cards, which pleased him greatly, he kept asking me continually if he could not be of some service to me. At first I did not accept, but a little while afterwards I thought it would be a great {219} thing if I could make the King of Spain my confederate in a trick. He consented, laughingly, and it was so arranged that from the stage I was to ask one of the audience to write a number, when the King was to get up and say, ‘I will write it,’ and do it. Of course, with such a confederate, the trick was accomplished with the greatest effect. The first thing I did in beginning the second part of my performance was to take a blank piece of paper. This I handed to the King, asking him to sign it at the bottom. He did so readily, and the paper was passed from hand to hand and given to me. I conjured up all the spirits that have been or will be, and lo and behold! the paper was closely written from the top to the place where His Majesty’s signature was affixed. It was handed back to him, and, while he laughed very heartily, he said, ‘I will not deny my signature to this document, which appoints Alexander Herrmann prestidigitateur to the King of Spain, and, as the spirits have done so, I heartily acquiesce.’ ” Those who are acquainted with the peculiar properties of sympathetic inks will readily understand the modus operandi of the above trick. For example: Copper sulphate in very dilute solution will produce an invisible handwriting, which will turn light blue when subjected to the vapor of ammonia. Again, write with a weak solution of sulphuric acid and the chirography will appear in black letters when the paper is submitted to a strong heat. To obtain the requisite heat, all you have to do is to lay the sheet of paper on a small table which has a top of thin sheet iron or tin. Beneath this top, concealed in the body of the table, is a spirit lamp—not a lamp run by spooks, but “spirits of wine.” Ample time for the chemical operation to take place is afforded by the patter of the conjurer.