'You have often observed that I joke with difficulty.'
'But what's wrong now?' asked the doctor quickly.
Alec looked at him and chuckled quietly.
'You'll neither of you sleep in your beds to-night. Another sell for the mosquitoes, isn't it? I propose to break up the camp and start marching in an hour.'
'I say, it's a bit thick after a day like this,' said Walker. 'We're all so done up that we shan't be able to go a mile.'
'You will have had two hours rest.'
Adamson rose heavily to his feet. He meditated for an appreciable time.
'Some of those fellows who are wounded can't possibly be moved,' he said.
'They must.'
'I won't answer for their lives.'