“No, Mr. Stephens, I’ve had such a good time all my life that I really don’t think, when I look back, that I ever had any real cause for sorrow.”

“Well, Miss Sadie, I hope with all my heart that you will be able to say the same when you are the same age as your aunt.  Surely I hear her calling.”

“I wish, Mr. Stephens, you would strike my donkey-boy with your whip if he hits the donkey again,” cried Miss Adams, jogging up on a high, raw-boned beast.  “Hi, dragoman, Mansoor, you tell this boy that I won’t have the animals ill used, and that he ought to be ashamed of himself.  Yes, you little rascal, you ought!  He’s grinning at me like an advertisement for a tooth paste.  Do you think, Mr. Stephens, that if I were to knit that black soldier a pair of woollen stockings he would be allowed to wear them?  The poor creature has bandages round his legs.”

“Those are his putties, Miss Adams,” said Colonel Cochrane, looking back at her.  “We have found in India that they are the best support to the leg in marching.  They are very much better than any stocking.”

“Well, you don’t say!  They remind me mostly of a sick horse.  But it’s elegant to have the soldiers with us, though Monsieur Fardet tells me there’s nothing for us to be scared about.”

“That is only my opinion, Miss Adams,” said the Frenchman hastily.  “It may be that Colonel Cochrane thinks otherwise.”

“It is Monsieur Fardet’s opinion against that of the officers who have the responsibility of caring for the safety of the frontier,” said the Colonel coldly.  “At least we will all agree that they have the effect of making the scene very much more picturesque.”

The desert upon their right lay in long curves of sand, like the dunes which might have fringed some forgotten primeval sea.  Topping them they could see the black, craggy summits of the curious volcanic hills which rise upon the Libyan side.  On the crest of the low sand-hills they would catch a glimpse every now and then of a tall, sky-blue soldier, walking swiftly, his rifle at the trail.  For a moment the lank, warlike figure would be sharply silhouetted against the sky.  Then he would dip into a hollow and disappear, while some hundred yards off another would show for an instant and vanish.

“Wherever are they raised?” asked Sadie, watching the moving figures.  “They look to me just about the same tint as the hotel boys in the States.”

“I thought some question might arise about them,” said Mr. Stephens, who was never so happy as when he could anticipate some wish of the pretty American.  “I made one or two references this morning in the ship’s library.  Here it is—­re—­that’s to say, about black soldiers.  I have it on my notes that they are from the 10th Soudanese battalion of the Egyptian army.  They are recruited from the Dinkas and the Shilluks—­two negroid tribes living to the south of the Dervish country, near the Equator.”