303 and 305. Originally, the crime of treason was conceived of as being committed against the monarch; a subject failing in his duty of loyalty to the Sovereign and acting against the Sovereign was deemed to be a traitor. Queens Anne Boleyn and Catherine Howard were executed for treason for adultery against Henry VIII, although most historians regard the evidence against Anne Boleyn and her alleged lovers to be dubious. As asserted in the 18th century trial of Johann Friedrich Struensee in Denmark, a man having sexual relations with a queen can be considered guilty not only of ordinary adultery but also of treason against her husband, the king. The English Revolution in the 17th century and the French Revolution in the 18th century introduced a radically different concept of loyalty and treason, under which Sovereignty resides with "The Nation" or "The People" - to whom also the Monarch has a duty of loyalty, and for failing which the Monarch, too, could be accused of treason. Charles I in England and Louis XVI in France were found guilty of such treason and duly executed. However, when Charles II was restored to his throne, he considered the revolutionaries who sentenced his father to death as having been traitors in the more traditional sense. In medieval times, most treason cases were in the context of a kingdom's internal politics. Though helping a foreign monarch against one's own sovereign would also count as treason, such were only a minority among treason cases. Conversely, in modern times, "traitor" and "treason" are mainly used with reference to a person helping an enemy in time of war or conflict. During the American Revolution, a slave named Billy was sentenced to death on charges of treason to Virginia for having joined the British in their war against the American colonists - but was eventually pardoned by Thomas Jefferson, then Governor of Virginia. Jefferson accepted the argument, put forward by Billy's well-wishers, that - not being a citizen and not enjoying any of the benefits of being one - Billy owed no loyalty to Virginia and therefore had committed no treason. This was a ground-breaking case, since in earlier similar cases slaves were found guilty of treason and executed. Under very different circumstances, a similar defense was put forward in the case of William Joyce, nicknamed Lord Haw-Haw, who had broadcast Nazi propaganda to the UK from Germany