There is nothing more to be done here, I think, unless, he stared earnestly and long at the dead ashes in the grate. 
( There ( ( is ( ( ( nothing more ) ( to ( be ( ( done here ) ( , ( ( I think ) , ) ) ) ) ) ) ( ( unless , ) ( he ( ( stared ( ( earnestly and ) long ) ) ( at ( ( the ( dead ashes ) ) ( in ( the grate ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (ADJP (ADJP (NN nothing) (JJR more)) (S (VP (TO to) (VP (VB be) (VP (VBN done) (ADVP (RB here)) (PRN (, ,) (S (NP (PRP I)) (VP (VBP think))) (, ,)))))) (SBAR (IN unless) (, ,) (S (NP (PRP he)) (VP (VBD stared) (ADJP (JJ earnestly) (CC and) (JJ long)) (PP (IN at) (NP (NP (DT the) (JJ dead) (NNS ashes)) (PP (IN in) (NP (DT the) (NN grate)))))))))) (. .)))
There is sdo much left to do. 
( There ( ( ( is sdo ) ( much ( left ( to do ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (ADVP (RB sdo)) (ADJP (RB much) (VBN left) (S (VP (TO to) (VP (VB do)))))) (. .)))