AUGUSTA — For 17 years, Ralph W. Ardito Sr. faithfully guarded an important piece of history for his fellow Knights of Columbus of Abnaki Council 334. The framed collage contains two original signatures of Mother Teresa, the woman who will be canonized on Sunday by Pope Francis and become Saint Teresa. In 1978, when Ardito was grand knight of the Augusta-based council, he proposed that the Knights dedicate the proceeds of their 80th Anniversary Charity Ball to Mother Teresa. Ardito, now 84, had learned of Mother Teresa and her Missionaries of Charity through a friend and fellow member of St.