French was summoned to see Roberts (5 April 1900), who told him (5 April 1900) that the fighting at Poplar Grove proved that the future lay with Mounted Infantry. French wrote to Colonel Lonsdale Hale, former Professor at Staff College (12 April 1900), for speaking out for the idea of cavalry against the "chatter and cackle" of its opponents, quoting the opinion of a German officer that Mounted Infantry were too poor at riding to fight effectively. French also clashed with Edward Hutton (14 April) when he asked for French's cavalry to be used to relieve his mounted infantry on outpost duty.