Then one day he made his discovery.
It came to him after all these weeks of watchful observation and puzzled surmises, suddenly, like the long-sought solution of a riddle that suggests itself to the mind in a flash. Not with the same authority, however. Great heavens! Could it be that? And after remaining thunderstruck for a few seconds he tried to shake it off with self-contumely, as though it had been the product of an unhealthy bias towards the Incredible, the Inexplicable, the Unheard-of--the Mad!
This--the illuminating moment--had occurred the trip before, on the return passage. They had just left a place of call on the mainland called Pangu; they were steaming straight out of a bay. To the east a massive headland closed the view, with the tilted edges of the rocky strata showing through its ragged clothing of rank bushes and thorny creepers. The wind had begun to sing in the rigging; the sea along the coast, green and as if swollen a little above the line of the horizon, seemed to pour itself over, time after time, with a slow and thundering fall, into the shadow of the leeward cape; and across the wide opening the nearest of a group of small islands stood enveloped in the hazy yellow light of a breezy sunrise; still farther out the hummocky tops of other islets peeped out motionless above the water of the channels between, scoured tumultuously by the breeze.
The usual track of the Sofala both going and returning on every trip led her for a few miles along this reefinfested region. She followed a broad lane of water, dropping astern, one after
