If you are new to 21st Century Renaissance you may find the following of use.
If you have a slow connection or a PDA, then you may prefer the 480 wide by 320 high version of the website available at /pda/index.html down from the main website address (deliberately not hyperlinked).
If you receive a page not found (404), or other error, please report it to the address on the Contact page. Be advised however, that bookmarking of (numbered) image pages, does not work across different versions of the website. This is a deliberate feature of the site. Bookmarking of other pages (main, group, series, person pages i.e. all the unnumbered pages) should be fine (so, please do report any problems). To find out the site version see the About page.
If you are having problems navigating, you might try Help - Navigation. This is also available on most of the pages.