164 PRACTICE OF PHYSIC 



I accompanied a party going to the sweet water- 

 place with the camels, where I bathed, and also 

 picked up several living specimens of another 

 singular, but very small shell, the mouth of which 

 opened to the left of its cell. The pool in which I 

 found them was situated at some little distance from 

 the camp, and among hard close-grained rocks of a 

 reddish brown colour, very different in external 

 appearance, from those in the neighbourhood of our 

 encampment, which were of a bright green colour, 

 containing evidently a considerable per centage of 

 the mineral, with which the water in their neigh- 

 bourhood was impregnated. 



Either the half-cooked venison of yesterday, or 

 the water in this place disagreeing with me, all the 

 afternoon of this day I was very ill, and as I felt 

 no better after bathing, I sent for Ohmed Medina, 

 to consult with him how we should manage, if I 

 were too ill to proceed on the morrow. Adam 

 Burrah, who accompanied him, however, undertook 

 to doctor me, and, creeping into my hut, with a 

 handful of fresh cow-dung, would make me hold it 

 under my nose, all the time he was pinching up the 

 whole of the scalp from the back of the head, 

 beginning very scientifically at the nape of the 

 neck, and managed, by pressing it forwards, and 

 pinching it up from all sides, to bring, gradually, 

 a good large fold of it over my forehead. This he 

 then included in a portion of his tobe, and applying 

 his teeth to assist him in its compression, I thought 



