Isabel Stewart of Lorn, Countess of Argyll - Wrong information

the Isabel Sterart that married Sir Colin Campbell ancestors of the dukes of Argyl was the daughter of Robert III King of Scots and Anabel Drummand. her sister Jane married a Stewart and sister Mary married McDonald Lord of the Isles. (see Americans of gentle birth and their ancestors : a genealogical encyclopedia ... embracing many authenticated lineages and biographical sketches of the founders of the colonies and their descendants found in all parts of the United States page 66 )