HARTLEY, a town of Northumberland, on the coast, situated north-west of Tynemouth, where Lord Delaval has constructed a pretty haven, whence coals are shipped for London. Here are large salt works and copperas works, and likewise considerable glass works; and there is here a canal cut through a solid rock to the harbour, 52 feet deep, 30 broad, and 900 long. These works are the sole property of Lord Delaval, and yield a revenue of above 20,000. per annum.