"To-morrow morning, sure!"
"But the alcohol?"
"We've still got what we started with from Detroit, minus only what we've burned reaching this place. And we reckoned when we set out that it would far more than be enough. Oh, that part of it's all right!"
"Well, you know best," she answered. "I trust you in all things, Allan. But now just look at this roast partridge; come, dear, let to-morrow take care of itself. It's supper-time now!"
After the meal they went to the flat rock and sat for an hour while the sun went down beyond the void. Its disappearance seemed to substantiate the polarization theory. There was no sudden obliteration of the disk by a horizon. Rather the sun faded away, redder and duller; then slowly losing form and so becoming a mere blur of crimson, which in turn grew purple and so gradually died away to nothing.
For a long time they sat in the deepening gloom, their rifles close at hand, saying little, but thinking much. The coming of night had sobered them to a sense of what now inevitably lay ahead. The solemn purple pall that adumbrated the world and the huge nothingness before them, so silent, so immutable and pregnant with terrible mysteries, brought them close together.
The vague, untrodden forest behind them, where the night-sounds of the wild dimly reechoed now and then, filled them with indefinable emotions. And that night sleep was slow in coming.
Each realized that, despite all calculations and all skill, the morrow might be their last day of life. But the morning light, golden and clear above the eastern sky-line of tall conifers, dispelled all brooding fears. They were both up early and astir, in preparation for the crucial flight. Stern went over the edge of the chasm, while Beatrice prepared breakfast, and made some final observations of wind, air currents and atmosphere density.
An eagle which he saw soaring over the abyss, more than half a mile from its edge, convinced him a strong upward current existed to-day, as on the day when they had made their short flight over the void. The bird soared and circled and finally shot away to northward, without a wing-flap, almost in the manner of a vulture. Stern knew an eagle could not imitate the feat without some aid in the way of an up-draft.
"And if that draft is steady and constant all the way across," thought he, "it will result in a big saving of fuel. Given a sufficient rising current, we could volplane all the way across with a very slight expenditure of alcohol. It looks now as though everything were coming on first-rate. Couldn't be better. And what a day for an excursion!"