BLACKWORTH, a township in the parish of EARSDON, eastern division of CASTLE ward, county of NORTHUMBERLAND, 4 miles (N.W.) fromNorth Shields, containing 243 inhabitants. Here is an extensive colliery, the produce of which, known as "Northumberland Wallsend," and " Earsdon Main," is of a superior quality. A school-room has been built, chiefly at the expense of the Duke of Northumberland.