Sister Marian Helen Collins, S.C., who was a teacher and school administrator, died April 29 at Mary the Queen Convent in Yonkers. She was 91. Sister Marian served in administrative posts at Immaculate Conception School in Stony Point, 1981-1984, and at Holy Trinity, Manhattan, 1971-1980, where she also taught, 1965-1971. She also taught in Manhattan at Sacred Heart, 1980-1981, and St. Ignatius Loyola, 1948-1960; and on Staten Island at Sacred Heart, 1960-1965. She worked in the patients accounts office at St. Vincent's Hospital-Westchester in Harrison, 1984-1997, and did data entry work for the Franciscan Friars in Manhattan, 1997-2003, and St. Anthony's Guild, 2003-2005. Born in Brooklyn, she entered the Sisters of Charity in 1947 and professed final vows in 1951. She held a bachelor's degree in history from the College of Mount St. Vincent, and two master's degrees, one in education from Manhattan College and one in school administration from Fordham. A Funeral Mass was offered May 2 at Mary the Queen Convent, with burial at Holy Cross Cemetery in Arlington, N.J.