	An agreement between Strachan and Prinsloo imposed on the former the duty of managing the latter's farm so as to relieve him of all duties of supervision. In spite of warnings, Strachan persistently and continuously failed to attend early in the morning and late in the evening, which was when important duties of supervising had to be done, with the result that those duties had to be performed by Prinsloo. Finally, on three successive days, Strachan did not appear on the farm at all, whereupon Prinsloo cancelled the agreement.