Sesquicentennial Briefing: Ann Arbor will celebrate its 150th birthday anniversary this year, and the people leading the affair were honored by City Council Monday night. Council confirmed a proclamation issued by Mayor James E. Stephenson last week, officially naming this the city's sesquicentennial birthday. Present at the meeting wre members of theSesquicentennial Commission, including chairman Douglas Crary (standing), who briefed council on the activities being planned. Behind Crary, commission member Ralph Munsy and executive secretary Lila Green look over the official proclamation.