Sir William Blackett, 1st Baronet of Newcastle
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Sir William Blackett (14 June 1657-Dec 1705) was the third son of Sir William Blackett, 1st Baronet of Maften. The Baronetcy of Newcastle was created for him in 1685.
He was High Sheriff of Northumberland in 1688. He was Member of Parliament for Newcastle 1685-1690, 1695-1700 and in 1705. He was Mayor of Newcastle.
He acquired large parts of the Allendale estate from the impoverished Sir John Fenwick in 1689 and develeloped considerable lead and coal mining interests. He also bought Wallington Hall, Cambo, Northumberland from Fenwick and substantially rebuilt it.
He married Julia Conyers in 1684 and was succeeded by their son William
