I have my mirror back!

- but alas, only temporarily. I ran the pump on the tube well for three days, which filled it only about 10 % full! and it drained dry again within five days :-< Not sure what next steps should be, but both the alternatives of a clay lining which would involve trucking in 50 tons of clay, or a huge rubberised lining, are prohibitively expensive, so we may end up with a swampy sunken garden at this end of the property...