"Perhaps the Doctor will keep a watch here over the camels, and if he sees any one stick up his head above the wall, he might bid him good-morning.

We know he is a nice shot, is the Doctor," and he tapped my rifle.
I nodded and the two of them set out laden with wires and the packages that looked like tobacco tins, heading for a stone erection in the centre of the square which resembled an altar, but was, I believe, a rostrum whence the native auctioneers sold slaves and other merchandise.
What they did there exactly, I am sure I do not know; indeed, I was too much occupied in keeping a watch upon the walls whereof I could clearly see the crest above the mist, to pay much attention to their proceedings.
Presently my vigilance was rewarded, for over the great gateway opposite, at a distance of about a hundred and fifty paces from me, appeared some kind of a chieftain clad in white robes and wearing a very fine turban or coloured head-dress, who paraded up and down, waving a spear defiantly and uttering loud shouts.
This man I covered very carefully, lying down to do so.

As Quick had said, I am a good rifle shot, having practised that art for many years; still, one may always miss, which, although I bore no personal grudge against the poor fellow in the fine head-dress, on this occasion I did not wish to do.

The sudden and mysterious death of that savage would, I felt sure, produce a great effect among his people.
At length he stopped exactly over the door and began to execute a kind of war-dance, turning his head from time to time to yell out something to others on the farther side of the wall.

This was my opportunity.