One wonders whether the marriage had secretly taken place between the consecutive chapters!
( One ( ( wonders ( whether ( ( the marriage ) ( ( had secretly ) ( taken ( place ( between ( the ( consecutive chapters ) ) ) ) ) ) ) ) ) ! ) )
(ROOT (S (NP (PRP One)) (VP (VBZ wonders) (SBAR (IN whether) (S (NP (DT the) (NN marriage)) (VP (VBD had) (ADVP (RB secretly)) (VP (VBN taken) (NP (NP (NN place)) (PP (IN between) (NP (DT the) (JJ consecutive) (NNS chapters))))))))) (. !)))
One inquires if a secret marriage occured. 
( One ( ( inquires ( if ( ( a ( secret marriage ) ) occured ) ) ) . ) )
(ROOT (S (NP (PRP One)) (VP (VBZ inquires) (SBAR (IN if) (S (NP (DT a) (JJ secret) (NN marriage)) (VP (VBD occured))))) (. .)))