From brief online research, hopefully correct - corrections and additions requested:
Samuel Mills - there was more than one Samuel Mills in Worcester, Massachusetts, in 1811; including one born about 1758 and another about 1791.
William E. Green, Esq. - perhaps William Elijah Green (1777-1865)
Edward Bangs, Justice of the Peace - presumably Judge Edward Bangs (1756-1818), father of Edward Dillingham Bangs.
If you have information to share on Samuel Mills, William E. Green, Esq., and Edward Bangs, Justice of the Peace, please leave a comment or contact me directly.