Phillipa against those curtains when â he â was away last year. Iâve painted the damn things.â
âLook here,â interrupted Guy, âexactly what are you driving at, Mr Alleyn? If you mean to suggest that my brotherââ
âI!â cried Arthur. âWhatâs it got to do with me? Why should you supposeââ
âI found traces of blotting paper on the shafts and inside the metal knobs,â said Alleyn. âIt suggested a substitution of the metal knobs for the bakelite ones. It is remarkable, donât you think, that they should so closely resemble one another? If you examine them, of course, you find they are not identical. Still, the difference is scarcely perceptible.â
Arthur did not answer this. He was still looking at the wireless.
âIâve always wanted to have a look at this set,â he said surprisingly.
âYou are free to do so now,â said Alleyn politely. âWe have finished with it for the time being.â
âLook here,â said Arthur suddenly, âsuppose metal knobs were substituted for bakelite ones, it couldnât kill him. He wouldnât get a shock at all. Both the controls are grounded.â
âHave you noticed those very small holes drilled through the panel?â asked Alleyn. âShould they be there, do you think?â
Arthur peered at the little steel shafts. âBy God, heâs right, Guy,â he said. âThatâs how it was done.â
âInspector Fox,â said Alleyn, âtells me those holes could be used for conducting wires and that a lead could be taken from the â the transformer, is it? â to one of the knobs.â
âAnd the other connected to earth,â said Fox. âItâs a job for an expert. He could get three hundred volts or so that way.â
âThatâs not good enough,â said Arthur quickly; âthere wouldnât be enough current to do any damage â only a few hundredths of an amp.â
âIâm not an expert,â said Alleyn, âbut Iâm sure youâre right. Why were the holes drilled then? Do you imagine someone wanted to play a practical joke on your father?â
âA practical joke? On
him
?â Arthur gave an unpleasant screech of laughter. âDo you hear that, Guy?â
âShut up,â said Guy. âAfter all, he is dead.â
âIt seems almost too good to be true, doesnât it?â
âDonât be a bloody fool, Arthur. Pull yourself together. Canât you see what this means? They think heâs been murdered.â
âMurdered! Theyâre wrong. None of us had the nerve for that, Mr Inspector. Look at me. My hands are so shaky they told me Iâd never be able to paint. That dates from when I was a kid and he shut me up in the cellars for a night. Look at me. Look at Guy. Heâs not so vulnerable, but he caved in like the rest of us. We were conditioned to surrender. Do you knowââ
âWait a moment,â said Alleyn quietly. âYour brother is quite right, you know. Youâd better think before you speak. This may be a case of homicide.â
âThank you, sir,â said Guy quickly. âThatâs extraordinarily decent of you. Arthurâs a bit above himself. Itâs a shock.â
âThe relief, you mean,â said Arthur. âDonât be such an ass, I didnât kill him and theyâll find it out soon enough. Nobody killed him. There must be some explanation.â
âI suggest that you listen to me,â said Alleyn. âIâm going to put several questions to both of you. You need not answer them, but it will be more sensible to do so. I understand no one but your father touched this radio. Did any of you ever come into this room while it was in use?â
âNot unless he wanted to vary the programme with a little bullying,â said Arthur.
Alleyn turned to Guy, who was