Shewalton House and estate is located in North Ayrshire

Shewalton House and estate were composed of the 'Lands of Shewalton' and the laird's dwelling, originally a tower castle and later a mansion house on the River Irvine in the Shewalton area, two miles from Irvine and west of Drybridge village, East Ayrshire, Dundonald Parish, Scotland.^[2] In 1883 the Boyle's estate of Shewalton was 2,358 acres in extent in Ayrshire and was worth at that time £2,708 a year.^[3]

• http://en.wikipedia.org/wiki/Shewalton House and estate