After presenting enough items to the professor, teams were given the following:

The professor goes off. A short while later the news comes - both your friend and Professor Oisy have disappeared. Your sources indicate that your friend went off angrily to confront Professor Oisy. There was a flash of green light from the area, and when people investigated, all they found was these numbers on a scrap of paper:

13 55 32 39 47 15 36 19 37 48 16 21 41 33

These numbers correspond to the ley lines. The corresponding descriptors are:

13	Rigid plastic
55	Expensive
32	V- or L-shaped
39	Educational
47	New
15	Glass and {metal and/or wood}
36	Eldritch
19	Tubular
37	Random
48	Ancient
16	Glass
21	Equiangular
41	Disposable
33	Y- or X-shaped

Taking the first letters, you get REVENGE TRAGEDY.