Sir John's direct descendant, The 3rd Viscount Palmerston (1784-1865), began the building of Classiebawn Castle on the peninsula, a baronial-style house designed by James Rawson Carroll.

The Temples were mostly absentee landlords, with the estate being run initially by middlemen, and later by land agents, such as Stewart and Kincaid,[3] a Dublin firm with offices in Sligo.

Thus, in May 1862, a Sligo newspaper reported: "In accordance with a custom of some years' standing, about sixty persons have been selected for emigration from the Parish of Ahamlish ... whose passages and outfit has been provided by his Lordship.

The city of Saint John in the colony of New Brunswick had to take many of Palmerston's evicted tenants into care and, outraged, sent a scathing letter to Palmerston expressing regret and fury that he or his agents, "should have exposed such a numerous and distressed portion of his tenantry to the severity and privation of a New Brunswick winter ... unprovided with the common means of support, with broken-down constitutions and almost in a state of nudity ... without regard to humanity or even common decency."

The graves of many of these unfortunate victims can be seen today on the old quarantine station, now a museum, at Grosse Isle, in the St. Lawrence River opposite Quebec City.

These combined conditions produced waves that were confirmed by satellite data on 7 March 2012 to have exceeded 15 metres (49 ft) in height.

[11] Mullaghmore is served by two hotels, a seafood restaurant, a grocery shop, a spiritual retreat centre and a fish farm.

[12] The Star Of the Sea Building originally housed the coast guard in the nineteenth century, and the Sligo Sisters Of Mercy made it their home in August 1929.

[14] For long-distance routes, the nearest Bus Éireann stop is at Cliffoney, around 5 kilometres (3.1 mi) distant, and is served several times per day.