One thing was worrying me dreadfully, but my heart gave a great throb of relief when I saw my ulster lying carelessly over the back of a chair.
( ( ( ( ( ( One thing ) ( was ( ( worrying me ) dreadfully ) ) ) , ) but ) ( ( my heart ) ( ( gave ( ( a ( great throb ) ) ( of relief ) ) ) ( when ( I ( saw ( ( my ( ulster ( lying carelessly ) ) ) ( over ( ( the back ) ( of ( a chair ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (CD One) (NN thing)) (VP (VBD was) (VP (VBG worrying) (NP (PRP me)) (ADVP (RB dreadfully))))) (, ,) (CC but) (S (NP (PRP$ my) (NN heart)) (VP (VBD gave) (NP (NP (DT a) (JJ great) (NN throb)) (PP (IN of) (NP (NN relief)))) (SBAR (WHADVP (WRB when)) (S (NP (PRP I)) (VP (VBD saw) (NP (NP (PRP$ my) (NN ulster) (VBG lying) (NN carelessly)) (PP (IN over) (NP (NP (DT the) (NN back)) (PP (IN of) (NP (DT a) (NN chair))))))))))) (. .)))
I was dreadfully worried about many things. 
( I ( ( ( was ( dreadfully worried ) ) ( about ( many things ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (ADJP (RB dreadfully) (JJ worried)) (PP (IN about) (NP (JJ many) (NNS things)))) (. .)))