The Rusper dock have long since closed and been built over but were the hive of industry in the 1800s and early 1900s and when they were England's main port for the export of production from the Coldharbour treacle mines. At this time it became harder to find large veins in the mines and the lighter treacle produced around Thurrock, where it was mass produced, was becoming more popular around the globe.
Thurrock also had the benefit of good rail and sea transport and a shopping centre and this spelled the end for treacle production in Surrey which had the knock on effect of the demise of the Rusper Docks. This was a blow for the local ecomomy and resulted in the loss of one local job. Mr W Mitty taking an enhanced redundancy package before signing on for twenty three years and retiring to his bed.
Solve this puzzle and you may be on your way.
The cache is a camoed container large enough for a trackable but only contains the log so please bring your own writing implement.