This affair is one of the haunting mysteries of the past, one of the problems that nobody has solved. The events occurred in 1600, but the interest which they excited was so keen that belief in the guilt or innocence of the two noble brothers who perished in an August afternoon, was a party shibboleth in the Wars of the Saints against the Malignants, the strife of Cavaliers and Roundheads. The problem has ever since attracted the curious, as do the enigma of Perkin Warbeck, the true character of Richard III, the real face behind ‘The Iron Mask, ’ the identity of the False Pucelle, and the innocence or guilt of Mary Stuart.