At last, however, it was discovered that Lady Sarah Wilson's energy was connected with despatch-running, and her liberty was threatened. One day while riding to Mafeking with her maid she was captured by the Boers. On reaching Snyman's camp, the general refused to allow her to proceed to her destination or to return to Setlagoli. She was then detained as a prisoner of war, pending negotiations with Colonel Baden-Powell regarding the terms of her release. The Colonel offered to exchange for Lady Sarah a Boer lady prisoner, but the enemy refused to part with their prize till Viljoen, who was incarcerated in Mafeking, was first given up. Colonel Baden-Powell then represented that he, as a natural consequence, and without terms of exchange, had at once transferred women and children prisoners to the care of their people; but the Boer general was not to be prevailed upon by argument. Eventually Viljoen was given up and Lady Sarah returned safe and well to Mafeking. The transaction, though somewhat unpleasant, was on the whole decidedly complimentary to Lady Sarah in particular, and to the British feminine sex in general. It fully proved that an Englishwoman might in future view herself as the equivalent of a Boer officer. The artillery-fire of the enemy was now beginning to prove more efficient than formerly. In spite of this, however, Colonel Baden-Powell, in the kindness of his heart, issued a warning to the Burghers advising them to make terms and go home. This very characteristic epistle is here reproduced, as it shows the amazing blend of serpent and dove in the spirit of the man who was at that moment facing the choice of death or surrender:-- "To the Burghers under arms round Mafeking:--