What a photograph shows us is how a particular thing could be seen, or could be made to look - at a specific moment, in a specific context, by a specific photographer employing specific tools.
Beautifully shot, impeccably paced, it was a clear, unrelenting look at the National Trust, its friends and enemies, and it makes you want to burn your passport and beg the Luftwaffe to have another go.
It is one thing to describe an interview with a gorgon or a griffin, a creature who does not exist. It is another thing to discover that the rhinoceros does exist and then take pleasure in the fact that he looks as if he didn't.
A courage which looks easy & yet is rare; the courage of a teacher repeating day after day the same lessons - the least rewarded of all forms of courage.