midnight
She knew nothing of the foul plot which had been concocted for her abduction . She knew not that Henry Carroll was then watching over her . In blissful ignorance of the danger that hovered near her , she sunk into the quiet sleep of innocence . After midnight her slumbers were disturbed by the unusual creaking of the boat , and the hasty puffs of steam from the escape-pipes . She awoke , and was at once sensible of the immense pressure to which the boilers were subjected . Awhile she lay and listened to the ominous sounds which indicated the danger of the boat ; then , much alarmed , she rose and dressed herself . For nearly an hour she sat in the darkness of the room , during which time the danger seemed momentarily to increase , until , no longer able to endure such agonizing suspense , she was about to leave the room .