Khalid is left alone with Najma and Najib. And one day, when they are playing a game of "donkey,"--Khalid carried Najib on his back, ran on all four around the tent, and Najma was the donkey-driver,--the child of a sudden utters a shriek and falls on the sand. He is in convulsions; and after the relaxation, lo, his right hand is palsied, his mouth awry, and his eyes a-squint. Khalid finds a young doctor at Al-Hayat, and his diagnosis of the case does not disturb the mind. It is infantile paralysis, a disease common with delicate children. And the doctor, who is of a kind and demonstrative humour, discourses at length on the disease, speaks of many worse cases of its kind he cured, and assures the mother that within a month the child will recover. For the present he can but prescribe a purgative and a massage of the arm and spine. On the third visit, he examines the child's fæces and is happy to have discovered the seat and cause of the affection. The liver is not performing its function; and given such weak nerves as the child's, a torpid liver in certain cases will produce paralysis. But Khalid is not satisfied with this. He places the doctor's prescription in his pocket, and goes down to Cairo for a specialist. He comes, this one, to disturb their peace of mind with his indecision. It is not infantile paralysis, and he can not yet say what it is. Khalid meanwhile is poring over medical books on all the diseases that children are heir to. On the fifth day the child falls again in convulsions, and the left arm, too, is paralysed. They take him down to Cairo; and Medicine, considering the disease of his mother, guesses a third time--tuberculosis of the spine, it says--and guesses wrong. Again, considering the strabismus, the obliquity of the mouth, the palsy in the arms, and the convulsions, we guess closely, but ominously. Nay, Medicine is positive this time; for a fifth and a sixth Guesser confirm the others. Here we have a case of cerebral meningitis. That is certain; that is fatal. Najib is placed under treatment. They cut his hair, his beautiful flow of dark hair; rub his scalp with chloroform; keep the hot bottles around his feet, the ice bag on his head; and give him a spoon of physic every hour. "Make no noise around the room, and admit no light into it," further advises the doctor. Thus for two weeks the child languishes in his mother's arms; and resting from the convulsions and the coma, he would fix on Khalid the hollow, icy glance of death. No; the light and intelligence might never revisit those vacant eyes. Now Shakib comes to suggest a consultation. The great English physician of Cairo, why not call _him_? It might not be meningitis, after all, and the child might be helped, might be cured. The great guesswork Celebrity is called. He examines the patient and confirms the opinion of his confrères, rather his disciples.