Tesla expanded on the signals he heard in a 9 February 1901 Collier's Weekly article entitled "Talking With Planets", where he said it had not been immediately apparent to him that he was hearing "intelligently controlled signals" and that the signals could have come from Mars, Venus, or other planets.
On 25 February, Koos De La Rey attacked a British column under Lieutenant-Colonel S. B. von Donop at Ysterspruit near Wolmaransstad. De La Rey succeeded in capturing many men and a large amount of ammunition. The Boer attacks prompted General Methuen, the British second-in-command after Lord Kitchener, to move his column from Vryburg to Klerksdorp to deal with De La Rey.