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The most obvious features of this plan are major roads coloured yellow, with their cumulative lengths noted at intervals of one mile. North is not orientated towards the top. As a result,Watford appears to the left of St Albans, and the boundary between Middlesex and Hertfordshire (a dashed black-ink line)runs from the top left of the map down through Elstree to Hadley. The paper carries a watermark from the James Whatman Turkey Mill.