Presently our fire being exhausted, and the enemy pressing on with spear and javelin, the position became untenable; the tent was nearly battered down by clubs, and had we been entangled in its folds, we should have been killed without the power of resistance.
Source, in full
A brief account of the attack that left him scarred from a spearhead that entered one side of his face and exited the other, in "Narrative of a Trip to Harar" (11 June 1855); published in The Journal of the Royal Geographical Society (June 1855)