Xavier:  Thank you for the rapid response.  I've just tried 
your suggestion for the past hour to no avail.  I'm sorry 
to be so ignorant but I've tried numerous combinations of:
<http://sci02:science@www.biology.com/learning/inheritance/ge>
nxfile.html/*
and I seem to get all the files linked to the login page, 
but nothing deeper than that (I've got my mirror links set 
to 20 so I don't think this is the constraint.)  I'm not 
using a proxy server but do you think there could be proxy 
issues?
Thanks for your patience.

Rick