ONE:Gregg failed to suppress an abrupt snigger. He lit a cigarette to cover his confusion. Once more he envisaged that flying figure on the horizon. "At the rate he was going," he remarked, steadily, "and barring accidents, I should say he's reached London by now."The grasshopper hopped and landed with a quite distinct thud, almost at their feet. They both looked at it without thinking about it at all. But its advent produced a pause.