Possible Clues:

• Tramp accurate about Director General
• March laboriously
• Intrude force in go-slow?
• Clump of trees originally planted by Dickensian halfwit?
• Wearily walk
• Participate in a forced march
• Walk with slow, heavy steps
• Sounds like the type of noise a giant would make with tramp
• Walk through deep snow, say
• Move through deep mud