In DH chapter 11, Lupin says, "I'd have been here three days ago but I needed to shake off the Death Eater tailing me." But then later in the chapter, Lupin says, "It's impossible to track anyone who Apparates, unless you grab hold of them as they disappear!"
Why on earth did it take him three days to get away? All he had to do was Apparate, and he'd be free and clear!
I can only think of a few reasons why he wouldn't just Apparate away, and none of them really hold up:
- It would make sense if he didn't know how to Apparate. But we know he does -- it's mentioned, once again, in that same chapter: "I had to Apparate very precisely onto the top step outside the front door..."
- Perhaps he was in an area where Apparation was blocked, like it was in Hogsmeade later in the book. But then there surely would have been more than just one Death Eater after him -- they wouldn't bother setting up an anti-Apparation charm just to leave it understaffed.
- Or maybe the Death Eater was close enough to him, at every moment during those seventy-two hours, to be able to grab him if he Apparated. But that's ridiculous -- then the Death Eater could just grab him anyway.
Why did it take Lupin three days to get away, when he could have just Apparated at any time?