CHAPTER XXII.
BEFORE THE WIND Soon after the island melted into the gloom, a flash of lightning leaped from the cloud and spread like a sheet of blue flame across the water.
For a second, Agatha saw black rocks and trees stand out against an overwhelming glare, and then they vanished and she saw nothing at all.
Lightning is common in Canada, but this had a terrifying brilliance unlike any that she had known.

While her dazzled eyes recovered from the shock she was deafened by a crash that rolled among the cloud-banks in tremendous echoes, and before it died away another blaze leaped down.

It was rather a continuous stream of light than a flash, because it did not break off but, beginning overhead, ran far across the lake.

The next enveloped the canoes in an awful light and she felt her hair crackle before the thunder came.
She was too entranced to feel afraid, and glanced at Thirlwell with half-closed eyes.

His face was set and his mouth shut tight, but he was paddling hard and she heard the others' labored breath as they kept time with him.