Many alumnae find it hard to hold back tears when they see Wellesley’s oldest graduates leading the reunion parade in antique cars. This year, the alumna who caused waterworks all along College Road was Mary Holt Hastings ’37 of Bedford, Mass., age 102. She was a celebrity of the weekend, in real life and on social media. At one point, a group of 2012 alumnae found Hastings in the midst of a photo shoot on the Academic Quad and gathered around her for their own group photo. A delighted, sprightly Hastings said, “I almost didn’t come, but I’m so happy I did!”