Mighells was given command of HMS Monck and distinguished himself in a battle off Málaga in 1704.

[1] He commanded an expedition off the coast of Spain in 1719 during the War of the Quadruple Alliance.

[2] He commanded the naval contingent in the Raid on Vigo, a naval descent on the Spanish port town of Vigo.

[2] He died on 21 March 1734 and is buried in Lowestoft Church.

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