> I've been using the 'Continue interrupted download' 
option 
> in WinHTTrack but it doesn't begin at 70MB 'bytes saved' 
> or so before the earlier erroneous 'finish' of the 
mirror; 
> I can see it actually overwriting files that have already 
> been retrieved locally. 

httrack always overwites html files, but generally it tries 
NOT to download anything.