may have been one of the teachers who went back after some papers he forgot.”
“Didn’t look like any of the teachers,” said Bart. “Besides the teachers wouldn’t run, as if the police were after them, and they wouldn’t act as frightened as that man did.”
“Well, what are we going to do about it?” asked Ned. “If we’re going to play that joke, let’s get busy. We won’t say anything about seeing the man unless something developes, and I don’t believe it will. Come on in. The front door seems to be open. We can go in that way, instead of around through the court; less chance of Riggs seeing us.”
“All right,” agreed Bart, “only I wish I knew who that man was.” The time was to come when the boys would have given a great deal to have been able to penetrate the identity of the mysterious stranger. But the three chums gave little heed to that now, for they were intent on playing a joke that Bart had evolved. A little later, finding the front door unlocked, they were inside the school, just as the distant town clock boomed out the hour of midnight.
CHAPTER II
THE MISSING DIAMOND BRACELET
There were three lads who had entered the Darewell High School so mysteriously at midnight, and, had any one seen them, who was acquainted with them, he would have at once asked:
“Where is the fourth member of the quartette? Where is Stumpy Masterson?” For there were four lads in the town of Darewell who were so inseparable that they had come to be known as “The Darewell Chums.” Their names you are already familiar with, and some of my readers have met them before in the previous books of this series.
In the first volume, entitled, “The Heroes of the School,” there was related how the four friends took part in a strange mystery, and how they got at the bottom of it. At one time they went up in a balloon, and were captured by some men who were their enemies, so that, for a time, it looked dubious for the lads. But our heroes were wide-awake, and resourceful, and managed to take care of themselves.
Their home, as I have said, was in the town of Darewell, which was located on the Still River, a stream that flowed into Lake Erie. Living not far from that great body of water, the four chums often made trips to it, though more frequently they went swimming in or sailing on the river, in summer, and skated on it in winter.
In the second volume of the series, called “Ned Wilding’s Disappearance,” a story was told of how Ned tried to become a millionaire on his own account. He speculated in stocks, and to do this he had to go to New York. There he became mixed up in some peculiar transactions, and he thought it was necessary for him to disappear to avoid arrest. His chums, who followed him to the city, tried for some time in vain to find him, and poor Ned suffered many hardships before the affair was finally straightened out.
“Frank Roscoe’s Secret” was the title of the third volume. There always seemed to be a mystery about Frank Roscoe, and his chums could never penetrate it. At times he was moody and distraught, and he seemed to have some secret that worried him. He made no confidant of any one and succeeded in avoiding all inquiries.
The four lads went camping, and it was hoped that Frank would forget his troubles, but, instead, he seemed to get right into the thick of them. Frank, for some years, had believed his father dead, but it transpired that he was not. Mr. Roscoe was kept in a private insane asylum, though he had full possession of his reason, only he was made ill by drugs constantly administered to him by men who had an interest in keeping him out of the way. How he was rescued, and the perils the boys ran in saving him after they had released him from the institution, you will find set down in the third book.
In the fourth book, called “Fenn Masterson’s Discovery,” there was related the details of a long trip the chums took on the Great Lakes. They were aboard a vessel commanded by Captain Wiggs, and almost from the start the boys were involved in a mystery. They were pursued by strange men, when they landed to witness a large grain elevator on fire, and eventually they succeeded in causing the breaking up of a gang of Chinese smugglers, and a band of scoundrels who were secretly taking valuable minerals from a cave, under land owned by a man whom the boys had once befriended. It was not until after some strenuous happenings that these events had come to pass, and, more than once, our friends were in danger. But Fenn Masterson succeeded in getting on the trail of the mystery, through an odd discovery he had made, and, though he was captured by the enemy, he used his eyes and ears to good advantage, so that when his friends came he could lead them to the secret cave.
Following the exciting events of their cruise on the Great Lakes, the boys had returned to Darewell, and had resumed their studies at the High School, where they were great favorites with the other pupils. At the time this story opens the fall term was well under way, and football was the chief sport, our heroes playing on the first team of the school.
The reason for the midnight visit of Bart, Frank and Ned to the school was this: Stumpy, the missing member of the quartette, was an odd sort of lad, always making collections of one thing or another. Sometimes it was postage stamps, or postmarks, and again minerals, or jackknives, or butterflies.
The day of the midnight visit, when the Darewell Chums, together with Bart’s sister Alice (who wanted to be a trained nurse) and her chum, Jennie Smith, were in a drug store getting soda and cream, Fenn had pulled from his pocket, together with his handkerchief, a small mud turtle. There had been a wild scramble on the part of the girls, and some ladies in the store, before Fenn recaptured the reptile.
“What’s that for?” Bart had asked.
“Oh, nothing,” Fenn had answered, as casually as possible.
“It certainly is something,” Ned had insisted, and they had badgered Fenn until he finally admitted that he was now collecting mud turtles, and had a number of them in a pen at home.
This had at once given Bart his cue for playing a joke, and it might be mentioned that the fun-loving youth never let go by a chance to play a trick. A little later, that same afternoon, after Fenn had been sufficiently “rigged” over his new fad, Bart Keene might have been seen whispering cautiously to Ned and Frank.
His proposal was that the three of them should pay a surreptitious visit to the school that Friday night, and, from the room of Professor Long, the science teacher, take a number of turtles, snakes and small alligators which the instructor kept for the use of his class in biology. The three conspirators planned to remove the reptiles, take them to Fenn’s house, slyly put them in with his collection of turtles, and then see what their chum would say when he found his number of reptiles so unexpectedly increased.
The plan found favor on the part of Ned and Frank. They had met at Bart’s home after supper, and started off, leaving word with Alice, that if Fenn accidentally came, he was to be detained, entertained, or something done to him, to prevent him from becoming suspicious over the absence of the three lads.
But Fenn, or Stumpy, which he was more frequently called, had no suspicions, and did not leave his house that night. Meanwhile, as told in the first chapter, Bart and the others had gone to the school, had suffered a momentary alarm at the sight of the mysterious man, and had finally gained an entrance through the front door, unexpectedly found open.
“Well, we’re in here, what’s next on the program?” asked Ned, of Bart.
“Go ahead up stairs, and don’t make any more noise than you have to.”
Long familiarity with the interior arrangements of the High School enabled the three lads to ascend the stairs without the aid of a light. Bart, as a precaution, however, had brought along a pocket electric flash lamp, to use when they reached the case of live
