Did this over three visits, first visit I took no pics and just got a feel for the place, second visit was with the kwan and sephiroth and third visit with squeezethatgap and a non member.
Hope you dont mind georgie - History:
The hydraulic tower was built in around 1852-55. Built from granite blocks, the octagonal tower housed a large accumulator, designed to store water under pressure. This water was then used to supply hydraulic power to capstans, lifting machinery and presses around the dock. The tower was adjoined by a pump house, built from brick with a tall chimney. Here a stationary steam engine powered a pump to keep the accumulator charged. Today the pump house is little more than a ruin, although the accumulator tower remains virtually intact.
 the kwan taking some of his own photos...
 - My first attempt at light painting with traffic, need a busier road and play with the settings on my camera I think!
 - We brought a load of tea light candles with us
 - My first, or like 10th, attempt at painting my name in light.