What was Mary Mackillop's miracle?

From the text:

The Vatican accepted the biographical details of Mother Mary as evidence of exceptional virtue. It accepted a miraculous cure in Sydney in 1961 of a young woman who was dying of leukemia and prayed to Mother Mary. Mother Mary MacKillop is now called "Blessed," the second-to-last step before formal recognition as a saint. Someone who has been "blessed" can be canonized by the pope as a saint only after evidence of one additional miracle.