......

Nothing here!
2_____________________.
Why would Mr Wagner have mud on his shoes
if he were practicing skills all morning?

......

That leaves lrma,Nestor and Prof Calculus.
3. ______________________!
If not, then who?
Perhaps someone we haven't thought of, or someone we don't even know.

......

Irma! Stop!What's going on?
These beasts have accused me of stealing Madame's emerald!

4._____________________?

That is... Well... Sort of!
It's a police trick that sometimes works.
After all, police work is a tricky business.
Please send in Calculus!
Very well.lf I were you,l'd try different approach this time.