In early September you received an annual appeal from Herron.
( ( In ( early September ) ) ( you ( ( ( received ( an ( annual appeal ) ) ) ( from Herron ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (JJ early) (NNP September))) (NP (PRP you)) (VP (VBD received) (NP (DT an) (JJ annual) (NN appeal)) (PP (IN from) (NP (NNP Herron)))) (. .)))
You received an yearly appeal from Herron in the middle of August. 
( You ( ( ( ( received ( an ( yearly appeal ) ) ) ( from Herron ) ) ( in ( ( the middle ) ( of August ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBD received) (NP (DT an) (JJ yearly) (NN appeal)) (PP (IN from) (NP (NNP Herron))) (PP (IN in) (NP (NP (DT the) (NN middle)) (PP (IN of) (NP (NNP August)))))) (. .)))