 Complete the following phrase:  Gough then served as ADC to Lord Dundonald, who was commanding mounted troops in Natal. In January 1900 he was promoted to brigade intelligence officer, a role which required a great deal of scouting. In mid-January he was sent to reconnoitre Potgeiters Drift, a crossing of the Tugela River, with a view to outflanking the Boer position at Colenso  which Buller had 