Sorry, pressed the wrong button - So it would appear that there are several ways in which QV could have developed the haemophilia gene to pass on to her descendents without her mother having to take a lover other than the Duke of Kent. In fairness, I think Packard was attempting to argue the question on scientific grounds rather than having a bee in his bonnet about the Duchess of Kent, but did not have a broad enough scientific knowledge to see that there were other possibilities than a strong likelihood that QV was illigitimate.