shift its position。 Slide in gently。〃
Bill slid in from the stern and swam slowly round to Antony。
〃What's it like？〃 said Antony。
〃Cold。 Well； here's luck to it。〃
He gave a sudden kick； flashed for a moment in the water； and was
gone。 Antony steadied the boat； and took another look at his landmarks。
Bill came up behind him with a loud explosion。 〃It's pretty muddy；〃
he protested。
〃Weeds？〃
〃No； thank the Lord。〃
〃Well； try again。
Bill gave another kick and disappeared。 Again Antony coaxed the
boat back into position； and again Bill popped up； this time in front of
him。
〃I feel that if I threw you a sardine；〃 said Antony； with a smile； 〃you'd
catch it in your mouth quite prettily。〃
〃It's awfully easy to be funny from where you are。 How much longer
have I got to go on doing this？〃
Antony looked at his watch。
〃About three hours。 We must get back before daylight。 But be
quicker if you can； because it's rather cold for me sitting here。〃
Bill flicked a handful of water at him and disappeared again。 He was
under for almost a minute this time； and there was a grin on his face when
it was visible again。
〃I've got it； but it's devilish hard to get up。 I'm not sure that it isn't
too heavy for me。 〃That's all right；〃 said Antony。 He brought out a ball
of thick string from his pocket。 〃Get this through the handle if you can；
and then we can both pull。〃
〃Good man。〃 He paddled to the side； took one end of the string and
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paddled back again。 〃Now then。〃
Two minutes later the bag was safely in the boat。 Bill clambered in
after it； and Antony rowed back。 〃Well done； Watson；〃 he said quietly； as
they landed。 He fetched their two coats； and then waited； the bag in his
hand； while Bill dried and dressed himself。 As soon as the latter was ready；
he took his arm and led him into the copse。 He put the bag down and felt
in his pockets。
〃I shall light a pipe before I open it；〃 he said。 〃What about you？〃
〃Yes。〃
With great care they filled and lit their pipes。 Bill's hand was a little
unsteady。 Antony noticed it and gave him a reassuring smile。
〃Ready？〃
〃Yes。〃
They sat down； and taking the bag between his knees； Antony pressed
the catch and opened it。
〃Clothes！〃 said Bill。
Antony pulled out the top garment and shook it out。 It was a wet
brown flannel coat。
〃Do you recognize it？〃 he asked。
〃Mark's brown flannel suit。〃
〃The one he is advertised as having run away in？〃
〃Yes。 It looks like it。 Of course he had a dashed lot of clothes。〃
Antony put his hand in the breast…pocket and took out some letters。 He
considered them doubtfully for a moment。
〃I suppose I'd better read them；〃 he said。 〃I mean； just to see …〃 He
looked inquiringly at Bill； who nodded。 Antony turned on his torch and
glanced at them。 Bill waited anxiously。
〃Yes。 Mark。。。。 Hallo！〃
〃What is it？〃
〃The letter that Cayley was telling the Inspector about。 From Robert。
'Mark； your loving brother is coming to see you … ' Yes； I suppose I had
better keep this。 Well； that's his coat。 Let's have out the rest of it。〃 He
took the remaining clothes from the bag and spread them out。
〃They're all here；〃 said Bill。 〃Shirt； tie； socks； underclothes； shoes
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yes； all of them。〃
〃All that he was wearing yesterday？〃
〃Yes。〃
〃What do you make of it？〃
Bill shook his head； and asked another question。
〃Is it what you expected？〃
Antony laughed suddenly。
〃It's too absurd；〃 he said。 〃I expected … well； you know what I
expected。 A body。 A body in a suit of clothes。 Well； perhaps it would
be safer to hide them separately。 The body here； and the clothes in the
passage； where they would never betray themselves。 And now he takes a
great deal of trouble to hide the clothes here； and doesn't bother about the
body at all。〃 He shook his head。 〃I'm a bit lost for the moment； Bill； and
that's the fact。〃
〃Anything else there？〃
Antony felt in the bag。
〃Stones and … yes； there's something else。〃 He took it out and held it
up。 〃There we are； Bill。〃
It was the office key。
〃By Jove； you were right。〃
Antony felt in the bag again； and then turned it gently upside down on
the grass。 A dozen large stones fell out … and something else。 He flashed
down his torch。
〃Another key；〃 he said。
He put the two keys in his pocket； and sat there for a long time in
silence； thinking。 Bill was silent； too； not liking to interrupt his thoughts；
but at last he said：
〃Shall I put these things back？〃
Antony looked up with a start。
What？ Oh； yes。 No； I'll put them back。 You give me a light； will
you？〃
Very slowly and carefully he put the clothes back in the bag； pausing
as he took up each garment； in the certainty； as it seemed to Bill； that it
had something to tell him if only he could read it。 When the last of them
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was inside； he still waited there on his knees； thinking。
〃That's the lot；〃 said Bill。
Antony nodded at him。
〃Yes； that's the lot；〃 he said； 〃and that's the funny thing about it。
You're sure it is the lot？〃
〃What do you mean？〃
〃Give me the torch a moment。〃 He took it and flashed it over the
ground between them。 〃Yes； that's the lot。 It's funny。〃 He stood up；
the bag in his hands。 〃Now let's find a hiding…place for these； and then …〃
He said no more； but stepped off through the trees； Bill following him
meekly。
As soon as they had got the bag off their hands and were clear of the
copse； Antony became more communicative。 He took the two keys out
of his pocket。
〃One of them is the office key； I suppose； and the other is the key of
the passage cupboard。 So I thought that perhaps we might have a look at
the cupboard。〃
〃I say； do you really think it is？〃
〃Well； I don't see what else it can be。〃
〃But why should he want to throw it away？〃
〃Because it has now done its work； whatever it was； and he wants to
wash his hands of the passage。 He'd throw the passage away if he could。
I don't think it matters much one way or another； and I don't suppose
there's anything to find in the cupboard； but I feel that we must look。〃
〃Do you still think Mark's body might be there？〃
〃No。 And yet where else can it be？ Unless I'm hopelessly wrong；
and Cayley never killed him at all。〃
Bill hesitated； wondering if he dare advance his theory。
〃I know you'll think me an ass …〃
〃My dear Bill； I'm such an obvious ass myself that I should be
delighted to think you are too。〃
〃Well； then； suppose Mark did kill Robert； and Cayley helped him to
escape； just as we thought at first。 I know you proved afterwards that it
was impossible； but suppose it happened in a way we don't know about
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and for reasons we don't know about。 I mean； there are such a lot of
funny things about the whole show that … well； almost anything might
have happened。〃
〃You're quite right。 Well？〃
〃Well； then； this clothes business。 Doesn't that seem rather to bear
out the escaping theory？ Mark's brown suit was known to the police。
Couldn't Cayley have brought him another one in the passage； to escape in；
and then have had the brown one on his hands？ And thought it safest to
hide it in the pond？〃
〃Yes；〃 said Anthony thoughtfully。 Then： 〃Go on。〃
Bill went on eagerly：
〃It all seems to fit in； you know。 I mean even with your first theory
that Mark killed him accidentally and then came to Cayley for help。 Of
course； if Cayley had played fair； he'd have told Mark that he had nothing
to be afraid of。 But he isn't playing fair； he wants to get Mark out of the
way because of the girl。 Well； this is his chance。 He makes Mark as
frightened as possible； and tells him that his only hope is to run away。
Well； naturally； he does all he can to get him well away； because if Mark is
caught； the whole story of Cayley's treachery comes out。〃
〃Yes。 But isn't it overdoing it rather to make him change his
underclothes and everything？ It wastes a good deal of time； you know。〃
Bill was pulled up short； and said； 〃Oh！〃 in great disappointment。
〃No； it's not as bad as that； Bill；〃 said Antony with a smile。 〃I
daresay the underclothes could be explained。 But here's the difficulty。
Why did Mark need to change from brown to blue； or whatever it was；
when Cayley was the only person who saw him in brown？〃
〃The police description of him says that he is in a brown suit。〃
〃Yes； because Cayley told the police。 You see； even if Mark had had
lunch in his brown suit； and the servants had noticed it； Cayley could
always have pretended that he had changed into blue after lunch； because
only Cayley saw him afterwards。 So if Cayley had told the Inspector that
he was wearing blue； Mark could have escaped quite comfortably in his
brown； without needing to change at all。〃
〃But that's just what he did do；〃 cried Bill triumphantly。 〃What fools
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we are！〃
Antony looked at him in surprise； and then shook his head。
〃Yes； yes！〃 insisted Bill。 〃Of course！ Don't you see？ Mark did
change after lunch； and； to give him more of a chance of getting away；
Cayley lied and said that he was wearing the brown suit in which the
servants had seen him。 Well； then he was afraid that the police might
examine Mark's clothes and find the brown suit still there； so he hid it； and
then dropped it in the pond afterwards。〃
He turned eagerly to his friend； but Antony said nothing。 Bill began
to speak again； and was promptly waved into silence。
〃Don't say anything more； old boy； you've given me quite enough to
think about。 Don't let's bother about it to…night。 We'll just have a look
at this cupboard and then get to bed。〃
But the cupboard had not much to tell them that night。 It was empty
save for a few old bottles。
〃Well； that's that；〃 said Bill。
But Antony； on his knees with the torch in his hand； continued to
search for something。
〃What are you looking for？〃 asked Bill at last。
〃Som