Why cannot we missionaries imitate these Arabs in living on heights?
_24th November, 1870._--Herpes is common at the plantations in Zanzibar, but the close crowding of the houses in the town they think prevents it; the lips and mouth are affected, and constipation sets in for three days, all this is cured by going over to the mainland.

Affections of the lungs are healed by residence at Bariwa or Brava, and also on the mainland.

The Tafori of Halfani took my letters from Ujiji, but who the person employed is I do not know.
_29th November, 1870._--_Safura_ is the name of the disease of clay or earth eating, at Zanzibar; it often affects slaves, and the clay is said to have a pleasant odour to the eaters, but it is not confined to slaves, nor do slaves eat in order to kill themselves; it is a diseased appetite, and rich men who have plenty to eat are often subject to it.
The feet swell, flesh is lost, and the face looks haggard; the patient can scarcely walk for shortness of breath and weakness, and he continues eating till he dies.

Here many slaves are now diseased with safura; the clay built in walls is preferred, and Manyuema women when pregnant often eat it.

The cure is effected by drastic purges composed as follows: old vinegar of cocoa-trees is put into a large basin, and old slag red-hot cast into it, then "Moneye," asafoetida, half a rupee in weight, copperas, sulph.