Sir Aubrey took his heels down leisurely from the second chair, pitched away his cigar, and, screwing his eyeglass into his eye with more than usual truculence, looked at her with disapproval. "Are you going to rig yourself out like that every evening for the benefit of Mustafa Ali and the camel-drivers?"
"I do not propose to invite the worthy Mustafa to meals, and I am not in the habit of 'rigging myself out,' as you so charmingly put it, for any one's benefit. If you think I dress in camp to please you, my dear Aubrey, you flatter yourself. I do it entirely to please myself. That explorer woman we met in London that first year I began travelling with you explained to me the real moral and physical value of changing into comfortable, pretty clothes after a hard day in breeches and boots. You change yourself. What's the difference?"
"All the difference," he snapped. "There is no need for you to make yourself more attractive than you are already."
"Since when has it occurred to you that I am attractive? You must have a touch of the sun, Aubrey," she replied, with uplifted eyebrows, drumming impatiently with her fingers on the table.
"Don't quibble. You know perfectly well that you are good-looking—too good-looking to carry through this preposterous affair."
"Will you please tell me what you are driving at?" she asked quietly. But the dark blue eyes fixed on her brother's face were growing darker as she looked at him.
"I've been doing some hard thinking to-day, Diana. This tour you propose is impossible."
"Isn't it rather late in the day to find that out?" she interrupted sarcastically; but he ignored the interruption.
"You must see for yourself, now that you are face to face with the thing, that it is impossible. It's quite unthinkable that you can wander for the next month all alone in the desert with those damned niggers. Though my legal guardianship over you terminated last September I still have some moral obligations towards you. Though it has been convenient to me to bring you up as a boy and to regard you in the light of a younger brother instead of a sister, we cannot get away from the fact that you are a woman, and a very young woman. There are certain things a young woman cannot do. If you had been the boy I always wished you were it would have been a different matter, but you are not a boy, and the whole thing is impossible—utterly impossible." There was a fretful impatience in his voice.
Diana lit a cigarette slowly, and swung round on her chair with a hard laugh. "If I had not lived with you all my life, Aubrey, I should really be impressed with your brotherly solicitude; I should think you really meant it. But knowing you as I do, I know that it is not anxiety on my behalf that is prompting you, but the disinclination that you have to travel alone without me. You have come to depend on me to save you certain annoyances and inconveniences that always occur in travelling. You were more honest in Biskra when you only objected to my trip without giving reasons. Why have you waited until to-night to give me those reasons?"