I must admit, I've never thought about the concept of time "legitimizing" the Lancastrian claim (if this was at all possible). Nor of there being a statute of limitations to one's claim (although I'm guessing had Arthur of Brittany lived or Eleanor of Brittany married and had kids, one would end up in a similar situation).
Thoughts?
@The Professor @mcdnab @Tyler96 @isabella @VVD0D95 @desmirelle
Eleanor of Brittany was actually supposed to marry the Duke of Austria, the question if she did, Austria is far from Brittany and England.