Guards Guards - Track

He stared and stared at the malformed little thing, and the idea that had been knocking for attention for the last few minutes finally gained entrance. Everyone in Ankh-Morpork wanted to find the dragon's lair. At least, wanted to find it empty. Bits of wood on a stick wouldn't do it, he was certain. But, as they said, set a thief...

He said, “Could one dragon sniff out another? I mean, follow a scent?”

***

Guards Guards - p162