James Howie, wife of Margaret Scott, who died in 1847 onboard the Lady McNaughton en route to Australia, was not the son of Andrew Howie and Jean Barclay as commonly thought by many. He was the son of Robert Howie and Mary Allan. See WikiTree profile James Howie (1804 - 1847) (https://www.wikitree.com/wiki/Howie-456) for further details and sources.
