In Natal, Buller was already pessimistic about the coming battle, although in England they only knew his great reputation. On Friday, December 15, he tried to cross the river. A sortie from Ladysmith might have taken the Boer pickets on Hlangwane Hill, but its significance was overlooked. The British lost 1100 men killed, ten artillery guns lost. A humiliating retreat was ordered at nightfall although half the army had not yet engaged the enemy. Lord Roberts' son was killed. Buller, at his wits end, advised Ladysmith to surrender, but Sir George White pledged to fight on.