On January 16, 1901, Jennie Mallard died at Alexian Brothers Hospital in Chicago from an abortion performed that day. Mrs. Margaret Simmons was arrested and held in the death. Mrs. Simmons' profession is listed as nurse or midwife.

The 1900 Census lists her as a physician living as a lodger in an hotel with a large population of servants, clerks, and other folks with such diverse jobs as paperhanger, insurance agent, druggist, and bookkeeper.

She was born in Ohio in September of 1862 to an Irish father and a German mother. I've been unable to learn anything else about her.