At last we camped, and when the camels were unloaded and driven out to pasture, I lay down under the rocks and rested. My body was very sore with headache and high fever, the accompaniments of a sharp attack of dysentery which had troubled me along the march and had laid me out twice that day in short fainting fits, when the more difficult parts of the climb had asked too much of my strength. Dysentery of this Arabian coast sort used to fall like a hammer blow, and crush its victims for a few hours, after which the extreme effects passed off; but it left men curiously tired, and subject for some weeks to sudden breaks of nerve.