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 polyfractal 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 realised 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.