 The population of the island had been estimated at 5,344 in 1755 and grew to over 15,000 by 1841.Islay remained with the Campbells of Shawfield until 1853 when it was sold to James Morrison of Berkshire, ancestor of the third Baron Margadale, who still owns a substantial portion of the island.The sundering of the relationship between the landowners and the island's residents proved consequential.