There's a line in an old Time Team episode about how Phil Harding [I think] had found one of the most exciting things an archaeologist could find: [Totally dead

There's a line in an old Time Team episode about how Phil Harding [I think] had found one of the most exciting things an archaeologist could find: [Totally deadpan] "A ditch." Indeed, the things that make good historical evidence are very frequently rather counter-intuitive.