Sister of Christian Charity Mary Mercedes (Marie) Johnson, 91, died Sept. 27 at Sacred Heart Convent, Wilmette. She was 91 years old.

Born in Minnesota, she entered the candidacy in 1941. She made first vows in 1946 and perpetual vows in 1952.

For 46 years, she ministered as a cook in convents in Wilmette, Chicago and other cities in the Midwest, and at the Generalate in Rome.

In 1992 she volunteered to go to Fulton, Missouri, where she embarked on a new ministry: parish visitor and director of an after-school program. She returned to Wilmette in 2008.