Frank was as a rule much cooler than his cousin. He had undoubtedly been equally astounded to hear of the terrible calamity that had befallen the banking inst.i.tution, in which most of the leading citizens of the town were financially interested; but he certainly did not show it the same way.

His eyebrows went up to indicate astonishment; and a slight frown settled on his grave face, as he replied to Andy's question.

"It's a stunner, just as you say, Andy; but I wish the Chief would tell us a few more details. I think it's a little queer n.o.body seemed to have any suspicion of this awful business at the time I left home on horseback, to ride up to the Quackenboss farm, where you had been watching our injured aeroplane all night."

"Well," continued the head of the Bloomsbury police force; "that's because the yeggs worked so neatly they never left a bit of mess around to arouse suspicion; and the first thing that was known of the looting of the bank was when Seth Jarvie, the day watchman, went into the place at seven this morning to relieve Cadger, the night man, and found him lying there, tied up like a bundle of goods, and nearly dead with fright and humiliation."

"Whew!" was the way Andy relieved his pent-up feelings at this point; while his cousin went on asking questions.

"Then Cadger must have seen the robbers, if they captured him; how about that, Chief?" he demanded, eagerly; for the excitement was beginning to take hold of him.

"That's right, he did, and was able to give us more or less information," the police officer continued. "Of course as soon as Jarvie saw what had happened he knew it was a case for me to handle, and so he ran across to Headquarters; and in a jiffy we had thrown a cordon of police around the building to keep out the curious citizens who would have no business inside, and spoil any trace of the rascals."

"And would you mind telling us what Cadger had to tell, Chief?" asked Frank.

"Not at all, because I'm depending on you boys to help run the thieves down, if you feel like giving the authorities any a.s.sistance," the other replied, craftily.

Frank's answer was immediate and to the point.

"Of course we'll do anything that's in our power, Chief. Both our fathers are interested in that bank; and besides, the good name of the town must suffer if it is wrecked by a wandering band of yeggmen. And we can understand why you should want to capture the thieves, Chief; because that's a part of your business. Please tell us what the bank watchman had to say."

"Then I will, and without any frills, if I can make it that way,"

returned the other earnestly. "Cadger says he was caught napping, not that he was asleep; but never dreaming of any danger, he stepped over to the door when he heard a knock and a voice said: 'It's me, Cadger, Mr.

Hedden, the cashier; I forgot some important papers, and have gotten out of bed to come back for them. Let me in without attracting any attention, if you can.'"

"What do you think of the smartness of that?" exclaimed Andy. "And so of course poor old Cadger, who is as honest as the day is long, never suspected any trick, but went and opened the door a crack?"

"Just what he did," returned the Chief, "and as that side of the bank was in the shadow he could only see the figure of a man, who slipped in alongside him. Before he knew what was happening he was being chocked by a pair of strong hands. Cadger started to struggle but another man must have joined the first, for he was knocked unconscious by a cruel blow, that's left his face all b.l.o.o.d.y and after that he didn't know a thing for an hour or two."

"Whee! you've got me all worked up with your story, Chief," said Andy again. "I can just seem to see the whole thing happening. And chances are, that when Cadger did come to, he found himself tied up, and unable to even whisper?"

"He had hard work to get enough breath, they had fastened the bandage across his mouth so tight; but he could see out of one eye. And lying there, Cadger watched the two yeggs go through the whole operation of getting nitroglycerine planted, and using all sorts of clothes and even the rugs off the floor of the president's room to deaden the sound of the explosion."

"They were old hands at the business, that's sure," remarked Frank, when the officer paused to catch his breath; for he was talking unusually fast in his desire to give them all the particulars in as brief a s.p.a.ce of time as possible.

"Yes, there can be no doubt of that," the Chief went on to say, wagging his head wisely; "and they had been able in some way to get on to a lot of things that make us wonder like the name of the cashier and the night-watchman. Looks mighty much like they must have had a friend around Bloomsbury, who put them wise to those facts. Then they seemed to have the running of the trains down pat also; for long after they had their arrangements made they just sat down and waited until the freight going north and pa.s.sing Bloomsbury at two-eighteen was pounding up-grade from Deering's Crossing, and making all manner of noise."

"Oh! to think of the smartness of that, would you?" burst out Andy. "I was wondering how they could blow open the safe, and the sound of the explosion never even be heard over at Headquarters, only half a block away; but now I see how it could be done. Just like a fellow says he can pull a hair out of your head, and you not feel it; and he makes out to give you a thump on the head with his other hand at the same time, so of course you never notice him pulling the hair."

"Just about on the same principle," said the officer, nodding; "for when that heavy freight goes pounding past the station, it makes enough noise to drown almost any sort of sound. The windows rattle, and we always have to stop talking until the caboose gets past. And that was the time they chose to explode their juice, with an absolute certainty that no policeman's ear would hear a single thing."

"And Cadger saw it all, did he?" asked practical Frank.

"A good lot of it, by twisting his head from time to time," replied Chief Waller. "And after the thing had been successfully done, he could watch the two thieves gathering the swag together, and putting it in a satchel they found in the cashier's room. Then, just at a quarter to three they doused the glim, which was only an electric torch one of them carried, and skipped out, locking the door on poor Cadger. It was hours afterwards when the day watchman came on duty and the discovery followed."

Frank and Andy had somehow turned, and exchanged a significant look about this time; and the expression of astonishment on the face of the latter deepened.

"Did you say an electric torch, Chief?" demanded Frank, immediately.

"Yes, one of the handy kind that are used so commonly now," the other replied.

"Tell us, did Cadger say anything about the thieves wearing masks over their faces; or did they use handkerchiefs to hide them from him?"

"I didn't mention that matter, but it was just as you say, Frank; both men had on masks all the time," answered the police officer.

"Black ones too, I expect?" ventured Andy.

"That's what they were; but see here, are you two just guessing this, or do you happen to know something about those men?" asked the other, quickly; for he could not help seeing from the manner of the Bird boys that they were on some sort of a scent; and he knew from past experiences that their sagacity could always be trusted to do the right thing.

"Well," Frank went on to say, drily, "while Andy was watching our new hydroplane out in the Quackenboss pasture, I worked until eleven o'clock in our shop, and then went home. This morning, early, after a bite to eat, I hurried over there to do some finishing touches and carry the thing out to apply to our broken plane, when to my astonishment I found that the shop had been broken into later in the night, as well as our hangar, where the aeroplane is usually kept. And here's what I discovered lying on the work-bench, where the men had forgotten them."

With these words he held up the flashlight torch, and the twin black masks; and they produced an immediate shock upon the Chief of Police.

"And you found those things in your workshop this morning, you say?"

he cried, reaching out to take hold of the torch, and the bits of black muslin.

"Yes, and whoever was there, they must have been mad because they didn't find the aeroplane, for they smashed a few things, just for spite, it looked like," was what Frank added.

"Then, if it was the same men who robbed the bank they must have known about you boys having a brand new machine. And say, that must mean one of the robbers was something of a birdman himself; because no greenhorn would ever think of making his getaway in an aeroplane. Don't you see that's a pretty good clue, Frank? I'll remember that when I'm getting in touch with other points, and find out if there's any aviator who's gone crooked of late. Yes, that's worth knowing, now; and I'm glad you mentioned it to me."

"What description did Cadger give of the men, Chief?" queried Frank.

"Oh! he said one was tall and thin; and the other short and wiry like, pretty much like a cat. I rather reckon he'd be the fellow who's been in the flying business. Seemed to have a stiff left arm too, like he'd met up with some sort of an accident. That might turn out to be a pointer; I'll just remember it. It surely was a lucky thing for me I saw you boys come sailing along and managed to attract your attention. I begin to feel better already. You gave me so much help on that other occasion, it just seems as if I had to fall back on you again."

"Better move your horse out of the way, Chief, because there comes a car at a licketty-split racing speed. Wonder what the fellows in it are thinking about, to take such chances. Why, h.e.l.lo! look there, Frank, perhaps you know the one who's at the wheel? Seems to me I've seen him before, and that his name is Percy Carberry."

"It is Percy," said Frank, "and alongside him who'd you expect to see but his shadow, Sandy Hollingshead? And they look some excited too, as though they'd heard about the robbery, and the Carberry family was threatened with bankruptcy if the missing funds were not recovered right away. There, he sees us, and is pulling up. I reckon he's looking for you, Chief."

The car that had been tearing along the pike came to a stop close to where the head of the Bloomsbury police force sat in his buggy.

Percy Carberry got out, and Andy could not but notice that he was not displaying his accustomed agility on this fine morning; indeed, he made a face as though it gave him a stab of pain every time he took a step.

"h.e.l.lo! Chief Waller!" remarked Percy in his customary patronizing way, ignoring the presence of the Bird boys completely and purposely, of course; "I've come out after you, to get your a.s.sistance in trying to find the rascals who broke into my hangar some time last night, and ran away with my biplane!"

Upon hearing these astonishing words it was little wonder that Andy and Frank once more looked at each other, with the light of understanding dawning on their faces.

CHAPTER VI

FIGURING IT ALL OUT

"That's a strange story you're telling us, Percy," said the Head of the local police force, at which the boy bridled up immediately.

"I don't see what there is so funny about it, Chief!" he exclaimed, frowning. "I tell you my hangar was broken open last night, and I'm out a biplane that cost me a good round sum. It's up to you to get on the track of the same, and recover it. I hereby offer a reward of three hundred dollars for the recovery of my machine uninjured, and make it five hundred if the thief is captured in the bargain."