midnight
Instead of wishing to sit up to sing , when every body else was sleepy , Isabel was the first to hint the benefit of early hours , yet in the morning her faded cheeks and sunk eyes indicated that the night had been spent in watching . Nay , what more excited his apprehensions , he discovered that besides the evening devotions , to which he had been long admitted , there was a secret service , which left on all their faces the mark of tears . Love , terror , pity , anxiety , and doubt , alike prompted Lord Sedley to discover the cause of this marked alteration . He determined to watch Isabel , and the next night saw her leave the house , soon after midnight , and enter an avenue of sycamores at some distance . He immediately followed her ; a loud barking of dogs changed every other emotion to lively apprehensions for her safety , but he soon saw her run back , and , on observing him coming to meet her , assume an untroubled countenance . `` Has this serene night , '' said she , `` made you too a truant with your pillow ? I have , of late , been little disposed to sleep , and enjoy a moon-light walk amazingly . ''