I saw that a faint streak of daylight was showing through the curtains of the windows, and that the clock on the mantelpiece pointed to close upon five o'clock. 
( I ( ( saw ( ( ( ( that ( ( ( a ( faint streak ) ) ( of daylight ) ) ( was ( showing ( through ( ( the curtains ) ( of ( the windows ) ) ) ) ) ) ) ) , ) and ) ( that ( ( ( the clock ) ( on ( the mantelpiece ) ) ) ( pointed ( to ( close ( upon ( five o'clock ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD saw) (SBAR (SBAR (IN that) (S (NP (NP (DT a) (JJ faint) (NN streak)) (PP (IN of) (NP (NN daylight)))) (VP (VBD was) (VP (VBG showing) (PP (IN through) (NP (NP (DT the) (NNS curtains)) (PP (IN of) (NP (DT the) (NNS windows))))))))) (, ,) (CC and) (SBAR (IN that) (S (NP (NP (DT the) (NN clock)) (PP (IN on) (NP (DT the) (NN mantelpiece)))) (VP (VBD pointed) (S (VP (TO to) (VP (VB close) (PP (IN upon) (NP (CD five) (RB o'clock))))))))))) (. .)))
I saw that it was still the middle of the night.
( I ( ( saw ( that ( it ( ( was still ) ( ( the middle ) ( of ( the night ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD saw) (SBAR (IN that) (S (NP (PRP it)) (VP (VBD was) (ADVP (RB still)) (NP (NP (DT the) (NN middle)) (PP (IN of) (NP (DT the) (NN night)))))))) (. .)))