that Amelia wept confidentially on the housekeeper's shoulder  and relieved herself a good deal. 
( ( that Amelia ) ( ( ( ( ( wept confidentially ) ( on ( ( the ( housekeeper 's ) ) shoulder ) ) ) and ) ( relieved ( herself ( a ( good deal ) ) ) ) ) . ) )
(ROOT (S (NP (DT that) (NNP Amelia)) (VP (VP (VBD wept) (ADVP (RB confidentially)) (PP (IN on) (NP (NP (DT the) (NN housekeeper) (POS 's)) (NN shoulder)))) (CC and) (VP (VBD relieved) (S (NP (PRP herself)) (NP (DT a) (JJ good) (NN deal))))) (. .)))
By relieved herself, the author means pee.
( ( By ( relieved herself ) ) ( , ( ( the author ) ( ( means pee ) . ) ) ) )
(ROOT (S (PP (IN By) (S (VP (VBG relieved) (NP (PRP herself))))) (, ,) (NP (DT the) (NN author)) (VP (VBZ means) (VP (VB pee))) (. .)))