By custom, certain privileges are permitted to him, but even these are strictly limited and clearly understood.

For instance, the German student may get drunk and fall asleep in the gutter with no other penalty than that of having the next morning to tip the policeman who has found him and brought him home.

But for this purpose he must choose the gutters of side-streets.

The German student, conscious of the rapid approach of oblivion, uses all his remaining energy to get round the corner, where he may collapse without anxiety.

In certain districts he may ring bells.