Mark S. Singer, of Florence, Mass., died April 27. He was the husband of Elizabeth Singer. Born in Plattsburgh, N.Y., he was the son of Miriam and Harold Singer. In addition to his wife, he is survived by his children, Paul, Emily and her husband Gregory, Ben and his wife Monica, and Sarah and her husband Patrick; her grandchildren, Rachel, Alexandra, Olivia, Stella, Zara, Zoe and Wrenna; and his sisters Susan and Marjorie.