Thank you Lisa - that was what I expected as I did not think that information from another source was accurate so disregard Peter and Christian altogether.
What is accurate is when Robert Bruce emigrated he went to a nephew Charles Buchan but we can find no entry for Charles in the Ellis Island records. We have no idea when he went to the USA.
When Robert arrived in NY on board the Assyria out of Glasgow, Charles his nephew was living at 547 Seaside Avenue, Terminal Island,Los Angeles.
Hope you have more success than we had. Many thanks,
Margie...............Peterhead and Cruden Bay