When did Annie Sullivan teach Laura Bridgman?

Laura Bridgman is she is a women who was like Helen Keller blind and deaf. After Doctor Howe died Annie heard about it and took a care of Laura in Brooklyn new york. From February 19 1884 to 1887 she stopped November 11 1887 because she had to help Helen Keller and Helen and Annie had a 49 year relationship Annie and Laura had about a 3 year relationship.