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One or two of them gave her a brief glance； and then went back to their。。。
What？ They didn't seem to be frightened。 Just very； very attentive。 It was like a vigil。 They were waiting for something to happen。
The thunder muttered again。
A couple of minutes later she was on her way down into the damp city。
。。。
There are some songs which are never sung sober。 〃Nellie Dean〃 is one。 So is any song beginning 〃As I was a walking 。。。〃 In the area around Ankh…Morpork； the favoured air is 〃A Wizard's Staff Has A Knob On The End〃。
The rank were drunk。 At least； two out of three of the rank were drunk。 Carrot had been persuaded to try a shandy and hadn't liked it much。 He didn't know all the words； either； and many of the ones he did know he didn't understand。
〃Oh； I see；〃 he said eventually。 〃It's a sort of humorous play on words； is it？〃
〃You know；〃 said Colon wistfully； peering into the thickening mists rolling in off the Ankh； 〃s'at times like this I wish old…〃
〃You're not to say it；〃 said Nobby； swaying a little。 〃You agreed； we wouldn't say nothing； it's no good talking about it。〃
〃It was his favourite song；〃 said Colon sadly。 〃He was a good light tenor。〃
〃Now； Sarge…〃
〃He was a righteous man； our Gaskin；〃 said Colon。
〃We couldn't of helped it；〃 said Nobby sulkily。
〃We could have；〃 said Colon。 〃We could have run faster。〃
〃What happened； then？〃 said Carrot。
〃He died；〃 said Nobby； 〃in the hexecution of his duty。〃
〃I told him；〃 said Colon； taking a swig at the bottle they had brought along to see them through the night； 〃I told him。 Slow down； I said。 You'll do yourself a mischief； I said。 I don't know what got into him； running ahead like that。〃
〃I blame the Thieves' Guild；〃 said Nobby。 〃Allowing people like that on the streets。。。〃
〃There was this bloke we saw done a robbery one night；〃 said Colon miserably。 〃Right in front of us！ And Captain Vimes； he said e On； and we run； only the point is you shouldn't run too fast； see。 Else you might catch them。 Leads to all sorts of problems； catching people。。。〃
〃They don't like it；〃 said Nobby。 There was a mutter of thunder； and a flurry of rain。
〃They don't like it；〃 agreed Colon。 〃But Gaskin went and forgot； he ran on； went around the corner and； well； this bloke had a couple of mates waiting。。。〃
〃It was his heart really；〃 said Nobby。
〃Well。 Anyway。 And there he was；〃 said Colon。 〃Captain Vimes was very upset about it。 You shouldn't run fast in the Watch； lad；〃 he said solemnly。 〃You can be a fast guard or you can be an old guard； but you can't be a fast old guard。 Poor old Gaskin。''
〃It didn't ought to be like that；〃 said Carrot。
Colon took a pull at the bottle。
〃Well； it is；〃 he said。 Rain bounced on his helmet and trickled down his face。
〃But it didn't ought to be；〃 said Carrot flatly。
〃But it is；〃 said Colon。
。。。
Someone else in the city was also ill at ease。 He was the Librarian。
Sergeant Colon had given him a badge。 The Librarian turned it round and round in his big gentle hands； nibbling at it。
It wasn't that the city suddenly had a king。 Orangs are traditionalists； and you couldn't get more traditional than a king。 But they also liked things neat； and things weren't neat。 Or； rather； they were too neat。 Truth and reality were never as neat as this。 Sudden heirs to ancient thrones didn't grow on trees； and he should know。
Besides； no one was looking for his book。 That was human priorities for you。
The book was the key to it。 He was sure of that。 Well； there was one way to find out what was in the book。 It was a perilous way； but the Librarian ambled along perilous ways all day。
In the silence of the sleeping library he opened his desk and removed from its deepest recesses a small lantern carefully built to prevent any naked flame being exposed。 You couldn't be too careful with all this paper around 。 。 。
He also took a bag of peanuts and； after some thought； a large ball of string。 He bit off a short length of the string and used it…to tie the badge around his neck； like a talisman。 Then he tied one end of the ball to the desk and； after a moment's contemplation； knuckled off between the bookshelves； paying out the string behind him。
Knowledge equals power。 。 。
The string was important。 After a while the Librarian stopped。 He concentrated all his powers of librarianship。
Power equals energy 。 。 。
People were stupid； sometimes。 They thought the Library was a dangerous place because of all the magical books； which was true enough； but what made it really one of the most dangerous places there could ever be was the simple fact that it was a library。
Energy equals matter。 。 。 。
He swung into an avenue of shelving that was apparently a few feet long and walked along it briskly for half an hour。
Matter equals mass。
And mass distorts space。 It distorts it into poly…fractal L…space。
So； while the Dewey system has its fine points； when you're setting out to look something up in the multidimensional folds of L…space what you really need is a ball of string。
。。。
Now the rain was trying hard。 It glistened off the flagstones in the Plaza of Broken Moons； littered here and there with torn bunting； flags； broken bottles and the occasional regurgitated supper。 There was still plenty of thunder about； and a green； fresh smell in the air。 A few shreds of mist from the Ankh hovered over the stones。 It would be dawn soon。
Vimes's footsteps echoed wetly from the surrounding buildings as he picked his way across the plaza。 The boy had stood here。
He peered through the mist shreds at the surrounding buildings； getting his bearings。 So the dragon had been hovering…he paced forward…here。
〃And；〃 said Vimes； 〃this is where it was killed。〃
He fumbled in his pockets。 There were all sorts of things in there … keys； bits of string； corks。 His finger closed on a stub end of chalk。
He knelt down。 Errol jumped off his shoulder and waddled away to inspect the detritus of the celebration。 He always sniffed everything before he ate it； Vimes noticed。 It was a bit of a puzzle why he bothered； because he always ate it anyway。
Its head had been about； let's see； here。
He walked backwards； dragging the chalk over the stones； progressing slowly over the damp； empty square like an ancient worshipper treading a maze。 Here a wing； curving away towards a tail which stretched out to here； change hands； now head for the other wing 。 。 。
When he finished he walked to the centre of the outline and ran his hands over the stones。 He realized he was half…expecting them to be warm。
Surely there should be something。 Some； oh； he didn't know； some grease or something； some crispy fried dragon lumps。 Errol started eating a broken bottle with every sign of enjoyment。 〃You know what I think？〃 said Vimes。 〃I think it went somewhere。〃
Thunder rolled again。
〃All right； all right；〃 muttered Vimes。 〃It was just a thought。 It wasn't that dramatic。〃
Errol stopped in mid…crunch。
Very slowly； as though it was mounted on very smooth； well…oiled bearings； the dragon's head turned to face upwards。
What it was staring at intently was a patch of empt