Frank hesitated a moment before answering, for what Tom proposed was a very rash thing to do. What is known as the "bore" is the big wave produced by the onrush of water in a place where the tides rise forty, fifty, or even sixty feet, according to the time of year. The Bay of Fundy, of which Minas Basin is a branch, is famous for these wonderful tides, and the movements of the water make a sight well worth watching. The two boys had often looked on with lively interest as the returning flood rushed eagerly up the channel and over the flats, until in an incredibly short time what had been a waste of red mud was transformed into a broad expanse of turbid water. "Rather a risky business, Tom, but I don’t mind trying it. I’m in the humour for almost anything to-day; so come along." And without more ado the boys doffed their boots and stockings, rolled up their trousers, and set out for the water’s edge. Emory Haynes watched them in silence until they had gone about fifty yards. Then, as if divining their foolish design, he called after them,— "Frank—Tom—where are you going to?" "Going to meet the bore. Don’t you want to come?" Frank shouted back. "Come along, Yankee, if you’re not afraid," he added, in a half scornful tone. Not the words, but the tone in which they were uttered, brought an angry flush out on Emory’s sallow cheeks, and without stopping to think of the folly of the thing, he too flung off his boots and started after the others. "Blessed if Yankee isn’t coming, after all," said Tom, under his breath, to Frank. "The chap’s got plenty of grit in him." Side by side, but in silence—for somehow or other they felt ill at ease—the three boys picked their way carefully over the slippery mud and soft sand, keeping a sharp look-out for the sink-holes or quicksands, in which they might easily sink to their waists, or even deeper, at one plunge. Hardly had they reached the edge of the channel when Frank, who had been gazing down intently toward the Basin, called out,— "There it comes, fellows. Doesn’t it look grand?" A good way off still, but drawing nearer with astonishing speed, a wall of dark foam-topped water came rushing up the channel and over the thirsty flats. It was several feet in height, and behind it followed the whole vast volume of the tide. The three lads had never been so close to the bore before, and they stood still and silent watching the grand sight until a shout from Emory broke the spell. "Now then, boys, let’s run for it."