Sam Fisher- Footprints in Snow

  NOW dressed in my uniform, this time a black one, I easily climb the iron fence and quietly move through the snow to the back of the mansion. Leaving footprints can’t be helped so I deliberately create unreadable tracks; that is, with each step I wiggle my foot to create unshapely holes and walk unevenly. This way it’s difficult to say just what sort of animal went through the grounds.
...

  I go outthe back door, close it, and step into my old footprints to keep from creating new ones.

- Operation Barracuda, Chapter 5