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The trouble with water.....
               
London Canal Museum - home page Enquiry 1 The trouble with water... Too much and too little Boats don't move alone Extra horse power Coastal connections Less pounds, shillings, and pence
  Boats could only be used on rivers and around the coast. This meant some very roundabout routes had to be used. Rivers were in poor condition. Parts of the river were not deep enough for boats. The picture shows a "flash lock" which was used to hold back water and then release enough for a boat to pass. Small drawing of a flash lock
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