The first substantiation — 『Demonstration』

 
 Bang, bang, bang, bang!
 
 The judge slammed his gavel down.
 
 ”Silence! Silence! ——— defendant, you are speaking too much to the witness. Please refrain from using an insulting manner of speech with the opposing party. I foyu go too far, this court will consider holding you in contempt of court.”
 
 Pfft, there’s some snickers here and there.
 
 ”Gh…!”
 
 Gritting his teeth, the lawyer looks this way.
 
 I gave him a smile, and a small curtsey.
 
 (“”Wahahahahahahaha!!”)
 
 For some reason, the laughter spread even more.
 
 
 
 Bang bang, and the judge slammed his gavel down.
 
 ”The discussion shall continue. ——— Witness, earlier you proposed we [listen to the invisible magic power as sound]. May I ask you to make the preparations for that?”
 
 ”Yes, Your Honour.”
 
 Bowing, I got down from the witness box, and walked to the desk where pieces of evidence were lined up.
 
 Standing beside me, my eyes met with my brother’s, and I gave him a nod.
 
 My brother turned to the judge, and raised his hand as he spoke.
 
 ”Your Honour. The fifth piece of evidence here is a [magic power detector] which the witness Leticia Ainsworth developed for the investigation of this case. Due to the difficulty in handling it, we would like to have the witness operate it herself, so may we have permission?”
 
 ”Of course, permission granted.”
 
 Bowing slightly to the judge who nodded at me, I took that machine — the magic detector — in my hand.
 
 
 
 This detector, which I have painstakingly made, consists of two units.
 
 One is the main body, stored in my shoulder bag.
 The other is a hand-held probe, connected to the main body by a cable.
 
 The main body has two dials, and the probe looks like a handheld microphone.
 
 There might be some who’ve seen old monster movies and end up reminded of geiger counters.
 
 I sling the main body’s bag over my shoulder, and take the probe in my hand.
 
 I narrowed down the main body’s sensitivity dial, set the wavelength detection dial to [mid-frequency], and turned around to face the judge.
 
 ”Then first, I would like everyone to have a look at how we use this magic power detector to detect ordinary magic power. ——— Prosecutor-sama. Sorry to bother, but could you use some magic?”
 
 Graham-nii-sama nodded at my words, and immediately started the magic chant.
 And then,
 
 ”[Torch]!”
 
 With the invocation phrase, a light dwelled upon my brother’s fingertip.
 
 I faced the probe in my brother’s direction, and gradually went and turned the sensitivity dial.
 
 Eventually———
 
 《Beeeeeeeeee》
 
 From the main body’s speaker came a beep sound.
 
 (“”Ooooh….””)
 
 The assembly hall began to stir.
 
 When I change the direction of the probe, the beep goes away, and when I point it at the magic, it gets louder again.
 
 ”Thus, with this detector here, you can hear the magic as a [sound]. ——— Prosecutor-sama, thank you very much.”
 
 When my brother deactivated the magic of the ‘lights’, the detector’s beeps also stopped with a 《poof》 sound.
 
 
 
 I turned down the sensitivity dial a second time, and looked round the assembly hall.
 
 ”Now then. Then let’s listen to the [sound of the box] in question. ——— Prosecutor-sama, may you?”
 
 ”Whenever you’re ready!”
 
 Graham-nii held the [box] up to his chest.
 
 I turned the wavelength detection dial, this time to [high-frequency], and pointed the probe at the box.
 
 ”Then, please do it.”
 
 My brother nodded, and pushed the box’s button.
 
 
 Press — release — press — release —
 
 If he keeps pressing the button, he will use up the magic power in no time, so I’ve asked him to press and release the button repeatedly.
 This is also according to what we’ve arranged beforehand.
 
 (“”…….””)
 
 With everyone in the assembly hall watching, I slowly turned the dial and gradually increased the sensitivity.
 
 Eventually———
 
 《Beee—, beee—, beee—》
 
 The magic power detector caught the magic power that cannot be detected by humans.
 
 (“”Ooooooh!!!!””)
 
 The assembly hall shook.
 
 
 
 Like before, I changed the direction of the probe and the sound changed.
 
 It would be difficult to do so perfectly, but I hope that by doing so, we can eliminate any doubt in the minds of those watching.
 
 ”Oh, it’s an interesting thing.”
 
 His Majesty, sitting next to the judge, looked at the detector with keen interest.
 
 ”Indeed. It’s the first time for me as well to have seen such a magic tool.”
 
 Next to the judge, he nodded yeah, yeah.
 
 
 
 Having generally finished moving the probe around, I called out to my brother.
 
 ”Prosecutor-sama, thank you very much.”
 
 My brother removed his finger from the button.
 I turned to face the judge, and bowed.
 
 ”That is all.”
 
 They cheered once more.
 And then, as expected———
 
 ”O-, objectioooon!!!!”
 
 A shrill voice flew out from beside us.
 
 
 
 The lawyer’s eyes were twitching, and the duke squinted from behind him, glaring this way with a grim expression.
 
 The lawyer then shouted out.
 
 ”Th-, the demonstration just now was a hoax! The prosecution and the witness must have colluded to match the timing of the sounds!!”
 
 With those words, the assembly hall became noisy.
 
 (“Come to think of it, that prosecutor and witness are brother and sister.”)
 
 (“No ways, you’re telling me that just now was actually a fake?”)
 
 From the objection out of desperation, doubts went and spread across the assembly hall.
 
 With a snap, I raised my hand.
 
 Bang bang bang, the judge slammed his gavel down.
 
 ”Silence! I permit the witness to speak.”
 
 I bowed, and addressed His Majesty and the judged seated before me.
 
 ”This detector here has now had its dial set, so anyone can hold it. ——— if you don’t mind, would someone not like to use it?”
 
 ””…….””
 
 His Majesty and the judge exchanged glances with one another.
 
 And in the next moment———
 
 Clunk clunk!!
 
 At my words, His Majesty and the judge stood up with amazing force.