"Unfortunately, I see no signs of pursuit," I answered.
He smiled.
"Nor will you, Nephew Robert. No, my problems are connected with the difficult task of attaining an imaginary spot in this trackless waste and puzzlement as to whether I have correctly estimated an equation of human values. You are not, perhaps, mathematical? Ah, too bad! There is no mental exercise so restful and diverting to the mind as algebra. But figures lack the warm interest of human equations. As, for instance, the exact degree of trust to be imposed in untrustworthy persons."
"Sail ho!" shouted the lookout in the main crosstrees.
Murray's calm face flushed with sudden emotion, and he took a step forward.
"Where does she lie?" he trumpeted through his clasped hands.
"Maybe one, two points to larboard, sir."
"Can you make her out?"
"Only tops'ls, sir; big 'uns."
"Let me know as soon as you make her," said Murray, and turned back to me.