How am I supposed to answer a Post???

[Peter Alcibiades]

The thing I would love to know is:  how do you reply to a post and make it 
threaded?  If you get the digest, and if you do Re: xxxx - as done above, 
then it appears as a new thread.

There must be some way to make your replies appear in the right threads, while 
replying to posts from the digest or from the web archive, but what is it?  
Anyone know?  They would do us all a favor by making it possible to keep the 
whole thing threaded.

Peter