Chapter V. A Spell of RainIsland or mainland? - Excursion. - Briant hand alone. - Amphibious. - Bands penguins. - Lunch. - From the top of the cape. - The three islands offshore. - A blue line on the horizon. - Back to Schooner. In the evening after supper Briant told the bigger boys the result of his exploration. Briefly it was as follows : to the east, beyond the forest zone, he had distinctly seen a line of water extending from north to south. That this was the horizon of the sea appeared indubitable. Hence it was on an island and not on a continent that the yacht had been wrecked. Gordon and the others received the information with considerable excitement. What! They were on an island and deprived of every means of leaving it ! Their scheme of finding a road to the eastw