The letter was from the Headquarters of the Rising Sun Detective Agency, and was brutally frank in denouncing the Bald Impostor as an impostor, and painfully plain in describing him as bald. It described in the simplest terms his mode of getting money and it warned Mr. Gubb to be on the outlook for him "as he is supposed to be working in your district at present." The Bald Impostor gasped. "A number of victims have organized," continued the letter, "what they call the Easy Marks' Association of America and have posted a reward of fifty dollars for the arrest of the fraud." The Bald Impostor glanced toward Philo Gubb and hastily turned the letter upside down. When Mr. Gubb returned, the Bald Impostor was rubbing the palms of his hands together and smiling. "My name, Mr. Gubb," he said, "is Allwood Burns. I am a detective. I have heard of your wonderful work in the so-called Muffins-Mustard case." "Waffles-Mustard," said Mr. Gubb. "I should say Waffles," said the Bald Impostor hastily. "I consider it one of the most remarkable cases of detective acumen on record. We in the Rising Sun Detective Agency were delighted. It was a proof that the methods of our Correspondence School of Detecting were not short of the best." Philo Gubb stared at his visitor with unconcealed admiration. "Are you out from the Rising Sun Deteckative Agency yourself?" he asked. The Bald Impostor smiled. "I wrote you a letter yesterday," he said. "If you have not received it yet you will soon, but I can give you the contents here and now. A certain impostor is going about the country--" Philo Gubb picked up the letter and glanced at the signature. It was indeed signed "Allwood Burns." Mr. Gubb extended his hand again and once more shook the hand of his visitor--this time far more heartily. "Most glad, indeed, to meet your acquaintance, Mr. Burns," said Philo Gubb heartily. "It is a pleasure to meet anybody from the offices of the Rising Sun Deteckative Agency. And if you ever see the man that wrote the 'Complete Correspondence Course of Deteckating,' I wish--" The false Mr. Burns smiled. "I wrote it," he said modestly. "I am _most_ very glad to meet you, sir!" exclaimed Philo Gubb, and again he shook his visitor's hand. "Because--" "Ah, yes, because--" queried the Bald Impostor pleasantly. "Because," said Philo Gubb, "there's a question I want to ask. I refer to Lesson Seven, 'Petty Thievery, Detecting Same, Charges Therefor.' I have had some trouble with 'Charges Therefor.'" "Indeed? Let me see the lesson, please," said the Bald Impostor. "'The charges for such services,'" Philo Gubb read, pointing to the paragraph with his long forefinger, "'should be not less than ten dollars per diem.' That's what it says, ain't it?" "It does," said the Bald Impostor. "Well, Mr. Burns," said Philo Gubb, "I took on a job of chicken-thief detecting, and I had to detect for two diems to do it, and that would be twenty dollars, wouldn't it?"