Question: Where did Charles James Irwin Grant, 6Th Baron De Longueuil's father die?
Answer: Kingston

He succeeded to the title of Baron de Longueuil on 17 January 1841. He died on 5 July 1848 at his residence of Alwington House in Kingston. Charles James Irwin Grant, only son of Charles William Grant, 5th Baron de Longueuil and Caroline Coffin, was born in Montreal on 1 April 1815