Born in Onemee, Ontario in 1923; died in Ottawa in 2008.
Studied history at the University of Toronto, and studied organ music with Godfrey Hewitt who was organist of Christ Church Cathedral in Ottawa for 50 years.
Southworth joined the news staff of The Ottawa Journal in 1948, served as the music and drama editor from 1953-75, and continued as an arts writer until the paper's demise in 1980.
Contributed a weekly arts column to other Ottawa papers beginning in 1988.
Was member and historian with the Media Club of Canada (originally the Canadian Women's Press Club.)
Was chairman of the Ottawa Centre of RCCO in 1972-1974, a board member of the Ottawa Kiwanis Music Festival, and a contributor to EMC.