Bad Things Come in Threes
In his commentary on Horace’s Soracte Ode (1.9), David West writes:
“Horace says sententiously, ‘When winds stop blowing, trees stop shaking’, meaning of course that unpleasant things do not last for ever. This could be said of a plague of locusts or a broken ankle or a professor with tenure” (Horace Odes I: Carpe Diem, Oxford 1995, 42-3)
The third unpleasant thing is odd at first glance, and suggests that West had at least one unpleasant colleague to put up with until he either died or retired.