What's the best way to navigate this site?
H.H. Richardson currently is a nine-page tour. If you follow the links within the text of the tour you will also visit the Shepley, Rutan & Coolidge, T.C. Link/Union Station, and Adams Memorial pages.
At the end of the Richardson tour you can check out the remaining pages individually. If you're interested in architecture only you might not be interested in FOR. But then again there might be something interesting you might miss...
If you like a little human interest in your reading go to FOR after the HHR tour and follow the links from there, returning back to the FOR page after visiting each FOR.
That should get you through the remaining pages in a less linear manner. Which is always more fun.