Published 12:23 pm Thursday, December 16, 2010

Mary Helen Clark and Peter Andrew O’Brien, both of Chelsea, wed on Dec. 12, 2010 at 3:30 p.m. Close family and friends attended the wedding ceremony and dinner.

Mary is the daughter of the late Mr. and Mrs. Joseph and Mary Clark. Peter is the son of the late Mr. and Mrs. Thomas O’Brien and Mary Dorine Winter.