Isabel was greedily watching the strife when the wind veered, and a battery of rain discharged its whole broadside full at her face. The gust lasted only a moment; but, when it had passed, her thin dinner-dress was wet all over. She knew that there would be fifty gusts all as bad as the first or worse, and that she must either enter the chapel or be drenched to the skin.
She drew the key from her bag. The lightnings served her for a lantern as she drove the steel into the keyhole; but before she could turn it in the lock another burst of cold rain smacked rudely at her bare shoulders. At length she pushed back the door. The lightnings seemed to leap into the chapel the moment she opened it, like a pack of eager dogs rushing in before their master. Swifter than greyhounds the cold white-and-blue radiance flashed over the cold white-and-blue of the azulejos, and then licked back into the dark.
In her retreat from the rain Isabel had forgotten supernatural terrors. But as soon as she was fairly over the threshold Joanninha's ghost-story rushed anew into her mind, and she was thankful for the lightnings which had shown her that the place was empty. Yet she dared not shut herself up in the chapel; so she resolved to stand just inside.
Without any warning a third gust sucked the great door out of her weak hand. The oak fell to, with a bang, which was nearly drowned in a sharp clap of thunder. Isabel leaped back to reopen it, and tugged at the handle with all her might. But the bolts and springs of the lock had done their work. And the key was outside.
Isabel did not lose her head. As soon as she had recovered from the first shock, the good blood of her old English stock thrilled in her veins. Here was an adventure. Antonio instantly flew into her thoughts, as usual. To-morrow she would meet Antonio. To-morrow she would tell him, this contemptuous Antonio, how she had passed a night of thunder and lightning in a haunted chapel. To-morrow Antonio should be made to realize what sort of a woman he was flouting. To-morrow Antonio would hang his head at the thought of his dull, superstitious, spiritless Portuguese bride.
Propping herself against the wall she took stock of the situation. The chapel was dry; and although her dress was wet it was not wet enough to give her a cold. In four or five hours it would be daylight, and she would have courage to find the spiral staircase. Once on the flat roof of the cloister she would be able to see Jackson and the other servants searching for her. Jackson and the servants and Antonio. They would be sure to send first thing for Antonio.
The warmth with which she pictured Antonio's arrival ebbed away when she suddenly remembered that she was leaning against the blue-and-white tile-painting of the Saint's death at Tyburn. With a little shiver she crossed over to the azulejos representing the Saint's birth. Meanwhile, the rain was still lashing the glass, and the thunder was making a din like the toppling of crags into cañons. What troubled her most was the jeweled crown on the head of the image above the altar. The bluish-white lightning seemed to have an affinity for the bluish-white stones, and several times Isabel felt sure that the brilliance lingered among the points of the diadem after it had fled from the rest of the chapel.
Once she could have sworn that some one entered through the cloister doorway, and that footsteps sounded upon the pavement; but the thunder was loud at the time, and she decided that she had only heard its reverberations. None the less, the fright weakened her nerve. All in a moment she felt weary, chilly, hungry, and so utterly miserable that she nearly cried. She pulled herself up in time and tried to brace up her nerves by chewing the bitter bark of irony. "This is one of my lucky days," she said to herself. "From this morning onward it has been wholly delightful. What a good grateful girl I ought to be!"
An ear-splitting clap of thunder put an end to her soliloquy. So awful was the crash that Isabel listened shuddering for the noise of falling walls and roofs. Not one stone or slate gave way; but she heard a sound a thousand times more fearful. It was a voice, a mumbling voice which seemed to prolong the worn-out rumblings of the thunder; a voice deep and rich; the voice of a man; a voice somewhere in the chapel.
Her heart nearly stopped beating. She strained terrified eyes into the furthest darkness. And she did not strain them in vain. In close succession four or five white beams of lightning lit up the choir.