Thanks, Damian!
There was also a documentary on UK TV a while back that showed a team of researchers attempting to replicate the various watering-systems that might have been used. As I recall, they rather resembled Archimedes screws ... the "ingenious pumping system operated by a foot tread mill" of Jammer's post, presumably ...
(Anyone else remember this documentary? Was it "Marvels of Ancient Engineering", or some such name?)
Hermione
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