Peacefully, at the P.R.H.C. on Friday, June 21, 2019, at the age of 72. Mary, best friend and wife of Arthur. Loving sister of Sharon (Wayne) Weston, John O’Brien, Michael (Janine) O’Brien, Adrian (Paulette) O’Brien, Brian O'Brien, Andy O’Brien, and the late Jim and Patsy O’Brien. Mary will be sadly missed by many nieces, nephews and their families. She was a wonderful lady and dedicated teacher at multiple Peterborough Separate Schools, 45 plus years of students and fellow teachers benefitted from her love and skills. The world has lost a wonderful caring person. Visitation will be held at ASHBURNHAM FUNERAL HOME, 840 Armour Road, Peterborough, on Sunday, June 23rd, from 3 to 5 p.m. Funeral Mass at the CATHEDRAL OF ST. PETER-IN-CHAINS, 411 Reid St., on Monday, June 24th, at 11 a.m. Reception to follow at Bishop Doyle Hall. Interment at St. Peter’s Cemetery. If desired, donations to Diabetes Canada would be appreciated.