“No, I think that is all right, Moussa,” my host answered. “I am not feeling very well to-night, though, and I should much prefer if you would stay on the island.”

I saw a struggle between his fears and his duty upon the swarthy face of the African. His skin had turned of that livid purplish tint which stands for pallor in a negro, and his eyes looked furtively about him.

“No, no, Massa Walker,” he cried, at last, “you better come to the hulk with me, sah. Look after you much better in the hulk, sah!”

“That won’t do, Moussa. White men don’t run away from the posts where they are placed.”

Again I saw the passionate struggle in the negro’s face, and again his fears prevailed.

“No use, Massa Walker, sah!” he cried. “S’elp me, I can’t do it. If it was yesterday or if it was to-morrow, but this is the third night, sah, an’ it’s more than I can face.”

Walker shrugged his shoulders.

“Off with you then!” said he. “When the mail-boat comes you can get back to Sierra Leone, for I’ll have no servant who deserts me when I need him most. I suppose this is all mystery to you, or has the Doctor told you, Captain Meldrum?”

“I showed Captain Meldrum the cooperage, but I did not tell him anything,” said Dr. Severall. “You’re looking bad, Walker,” he added, glancing at his companion. “You have a strong touch coming on you.”

“Yes, I’ve had the shivers all day, and now my head is like a cannon-ball. I took ten grains of quinine, and my ears are singing like a kettle. But I want to sleep with you in the cooperage to-night.”