George took his handkerchief from his pocket and wiped his face. His throat was horribly dry, and he could hardly breathe.

'Will you give me your revolver,' said Alec, quietly.

'I haven't got it. I lost it this afternoon when we made that sortie. I didn't tell you as I thought you'd get in a wax about it.'

'I saw you cleaning it less than an hour ago,' said Alec, gravely.

George shrugged his shoulders pettishly.

'Perhaps it's in my tent. I'll go and see.'

'Stop here,' said Alec sharply.

'Look here, I'm not going to be ordered about like a dog. You've got no right to talk to me like that. I came out here of my own free will, and I won't let you treat me like a d.a.m.ned n.i.g.g.e.r.'

'If you put your hand to your hip-pocket I think you'll find your revolver there.'

'I'm not going to give it you,' said George, his lips white with fear.

'Do you want me to come and take if from you myself?'

The two men stared at one another for a moment. Then George slowly put his hand to his pocket and took out the revolver. But a sudden impulse seized him. He raised it, quickly aimed at Alec, and fired. Walker was standing near him, and seeing the movement, instinctively beat up the boy's hand as pulled the trigger. In a moment the doctor had sprung forward and seizing him round the waist, thrown him backwards. The revolver fell from his hand. Alec had not moved.

'Let me go, d.a.m.n you!' cried George, his voice shrill with rage.

'You need not hold him,' said Alec.

It was second nature with them all to perform Alec's commands, and without thinking twice they dropped their hands. George sank cowering into a chair. Walker, bending down, picked up the revolver and gave it to Alec, who silently fitted into an empty chamber the cartridge that had been brought to him.

'You see that it fits,' he said. 'Hadn't you better make a clean breast of it?'

George was utterly cowed. A sob broke from him.

'Yes, I shot her,' he said brokenly. 'She made a row and the devil got into me. I didn't know what I'd done till she screamed and I saw the blood.'

He cursed himself for being such a fool as to throw the cartridge away.

His first thought had been to have all the chambers filled.

'Do you remember that two months ago I hanged a man to the nearest tree because he'd murdered one of the natives?'

George sprang up in terror, and he began to tremble.

'You wouldn't do that to me.'

A wild prayer went up in his heart that mercy might be shown him, and then bitter anger seized him because he had ever come out to that country.

'You need not be afraid,' answered Alec coldly. 'In any case I must preserve the native respect for the white man.'

'I was half drunk when I saw the woman. I wasn't responsible for my actions.'

'In any case the result is that the whole tribe has turned against us.'

The chief was Alec's friend, and it was he who had sent him the exploded cartridge. The news came to Alec like a thunderclap, for the Turkana were the best part of his fighting force, and he had always placed the utmost reliance on their fidelity. The chief said that he could not hold in his young men, and not only must Alec cease to count upon them, but they would probably insist on attacking him openly. They had stirred up the neighbouring tribes against him and entered into communication with the Arabs. He had been just at the turning point and on the verge of a great success, but now all that had been done during three years was frustrated. The Arabs had seized the opportunity and suddenly a.s.sumed the offensive. The unexpectedness of their attack had nearly proved fatal to Alec's party, and since then they had all had to fight for bare life.

George watched Alec as he stared at the ground.

'I suppose the whole d.a.m.ned thing's my fault,' he muttered.

Alec did not answer directly.

'I think we may take it for certain that the natives will go over to the slavers to-morrow, and then we shall be attacked on all sides. We can't hold out against G.o.d knows how many thousands. I've sent Rogers and Deacon to bring in all the Latukas, but heaven knows if they can arrive in time.'

'And if they don't?'

Alec shrugged his shoulders, but did not speak. George's breathing came hurriedly, and a sob rose to his throat.

'What are you going to do to me, Alec?'

MacKenzie walked up and down, thinking of the gravity of their position.

In a moment he stopped and looked at Walker.

'I daresay you have some preparations to make,' he said.

Walker got up.

'I'll be off,' he answered, with a slight smile.

He was glad to go, for it made him ashamed to watch the boy's humiliation. His own nature was so honest, his loyalty so unbending, that the sight of viciousness affected him with a physical repulsion, and he turned away from it as he would have done from the sight of some hideous ulcer. The doctor surmised that his presence too was undesired.

Murmuring that he had no time to lose if he wanted to get his patients ready for a night march, he followed Walker out of the tent. George breathed more freely when he was alone with Alec.

'I'm sorry I did that silly thing just now,' he said. 'I'm glad I didn't hit you.'

'It doesn't matter at all,' smiled Alec. 'I'd forgotten all about it.'

'I lost my head. I didn't know what I was doing.'

'You need not trouble about that. In Africa even the strongest of us are apt to lose our balance.'

Alec filled his pipe again, and lighting it, blew heavy clouds of smoke into the damp air. His voice was softer when he spoke.

'Did you ever know that before we came away I asked Lucy to marry me?'

George did not answer. He stifled a sob, for the recollection of Lucy, the centre of his love and the mainspring of all that was decent in him, transfixed his heart with pain.

'She asked me to bring you here in the hope that you'd,'--Alec had some difficulty in expressing himself--'do something that would make people forget what happened to your father. She's very proud of her family. She feels that your good name is--besmirched, and she wanted you to give it a new l.u.s.tre. I think that is the object she has most at heart in the world. It is as great as her love for you. The plan hasn't been much of a success, has it?'

'She ought to have known that I wasn't suited for this sort of life,'

answered George, bitterly.