After a brief flight the insect settled down well toward the centre of another patch of shrubbery. Having prepared his net, the hunter set about forcing his way into this patch, but before he was in reach of his prey the pressure on the close-knit vegetation had disturbed the sensitive insect and again it rose, this time in alarm. Though barely an inch across the wings, this species exhibits capacities for flight greater than that of much larger butterflies. When again it alighted, the pursuer, panting and perspiring, had been drawn in a semicircular course, some hundreds of yards inland. This time he did not get near enough for a trial of his net before the elusive creature was off again. The third flight was a briefer one. After tentative flutterings, the _pseudargiolm_ alighted on a marshmallow leaf in a hollow. Taking profit of his previous failures, Professor Ravenden sat down and got his breath while waiting for the quarry to lapse into a state of undisturbed quietude. Thus, it was easy presently for the hunter to net it and transfer it to the cyanide jar. This done, he realised with a start of conscience that he had wasted ten minutes, and was a quarter of a mile off the track of his engagement. With all speed, he pointed across the knolls toward the beach. Fog was drifting in from the ocean, giving added incentive to haste. Wisest it would be, the professor judged, to make for the near point of the cliff, so that he might have a line to follow should mist blot the landscape. The beach below was just dimming with the advance of the first folds of grey when Professor Ravenden reached the brink. The nearer sands were cut off from his vision by a rise between himself and the rendezvous. As his eye ranged to the west for the readiest access to the level, it was caught and held by the outstretched body of Dick Colton lying upon the hard sand out from the mouth of the ravine where Serdholm and Haynes had met their death. For the moment the scientist was stunned into inaction. Suddenly the body twitched, and there swept over the unhappy entomologist a dreadful sense of his own negligence and responsibility. Along the heights paralleling the beach-line he ran at utmost speed, dipped down into a hollow where, for the time, the prospect was shut off, and surmounted the slope beyond, which brought him almost above the body, and a little to the east of the gully. Meantime the fog had been closing down, and now, as the professor reached the spot, it spread a grey and wavering mantle between him and what lay below.