Interestingly, the field of archaeoacoustics suggests that the design of sound- shaping sculptures by humans may have a much longer history than previously thought.

Although it was a scorching desert by day, temperatures could drop as low as the teens at night.

The mislayer of a merestone is to blame

The paving downstream consisted of 18x18x8-inch blocks laid on edge over a brick base which in turn was underlain with a gravel or brick chip filter. Since there was some controversy as to whether an underfilter was necessary, the first test was made with the filter omited.