Basil
[Regarding Fidget's note]
Offhand I can deduce very little, Only that the words are written with a broad-tip quill pen that has spattered, twice; that the paper is of native Mongolia manufacture, no watermark; and has
[smacks his lips against the paper]
Basil
been gummed, if I'm very much in error...
[smells paper]
Basil
...by a bat who has been drinking Rodent's Delight, a cheap brandy served only in the seediests pubs.
Basil
Oh, not really, doctor. We still don't know where it came from. Perhaps a closer inspection will tell us something.
[Looks at note under microscope]
Basil
Coal dust, clearly of the type used in sewer lamps.
[Takes note and sets it on fire]
Basil
Shh. Don't speak.
[He grinds the ashes in a crucible and pours them into a beaker]
Basil
Excuse me, Doctor.
[Takes beaker and a bottle of liquid]
Basil
Steady hand...
[pours a drop into beaker and sets it at the other end of a pipe; he boils a liquid on the other end, watching as it goes through the pipe]
Basil
Come on, come on. Good, bad, bad, good. Come on, come on, come on.
[Liquid finally reaches beaker; chemical explodes]
Basil
Aha! We've done it, old fellow! This chemical reaction could only be triggered by the paper's extreme saturation with distilation of sodium chloride.
Basil
It proves beyond a shadow of a doubt, this note came from the riverfront area.
[Pins a map of the river on the wall]
Basil
No, it's elementary, Dawson. We simply look for a seedy pub at the only spot...
[Pins dart on map]
Basil
...where the sewer connects with the riverfront.