He thought very hard and did not speak for a mile. He thought all the more.

"Tim knows 'em all, of course. And Geordie may, though I remember his saying he didn't. But who does Miss Mackarness know? If I can spot that, I can spot the winner."

He went back to the time of Pen's youth, which he only knew by hearsay, as he wasn't much more than born then, and went through the list one by one.

"By Jove!" he said, suddenly, and Penelope started.

"Yes, Bob."

"No," said Bob, thoughtfully; "no, I'm not sure."

"What aren't you sure of, dear?"

"Him," said Bob, and Penelope sighed.

After another mile's silence, Bob spoke again.

"By Jove!"