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The hamlet name is Anglo Saxon in origin, and means 'gravel hill'.
It appears spelt as Synkelburgh, in 1440, on a plea roll of the Court of Common Pleas, where a resident Thomas May, with others, was accused of trespassing on John Carter's land in Great Horwood & assaulting him. 
- National Archives; CP40 / 0717; http://aalt.law.uh.edu/AALT1/H6/CP40no717/aCP40no717fronts/IMG_0849.htm (entry number 7)
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