James Hughes wrote:

I'm trying to look at the Boost documentation - but the website appears to be dead, so I cannot use the bit I want as I have no idea how!

I see the same here.

Is it possible to download a PDF of all the Boost docs for when this situation arises so I can keep working?

You should have a full copy of the docs with your boost installation. Just open the index.html file from the directory that you downloaded/unzipped for boost. Jeff