1. Walk groundly; talk profoundly; drink roundly; sleep soundly. 

2. 2 Walk groundly; talk profoundly; drink roundly; sleep soundly. 

3. 1 Walk groundly; talk profoundly; drink roundly; sleep soundly. 

4. Such a traveller may sleep soundly and awaken refreshed - that is, unless the train stops and the sudden silence wakes him.