Some time before 1565 ( some sources say as early as 1500 ) , an enormous deposit of graphite was discovered on the approach to Grey Knotts from the hamlet of Seathwaite in Borrowdale parish , Cumbria , England .
Some time before 1565 ( it may have been as early as 1500 ) , an enormous deposit of graphite was discovered in Borrowdale , Cumbria .