Sumner co-operated effectively with Horace Mann for the improvement of the system of public education in Massachusetts.
The Horace Mann school in Boston, a public day school for the deaf, the New England industrial school for deaf mutes at Beverly and the Clarke school for the deaf at Northampton are maintained in part by the state.
Unfortunately an exact record of the steps in her education was not kept; but from 1888 onwards, at the Perkins Institution, Boston, and under Miss Sarah Fuller at the Horace Mann school in New York, and at the Wright Humason school, she not only learnt to read, write, and talk, but became proficient, to an exceptional degree, in the ordinary educational curriculum.
The services of Horace Mann as secretary of the state board (1837-1848) were productive of almost revolutionary benefits not only to Massachusetts but to the entire country.
The two persons who have written authoritatively about Miss Keller's speech and the way she learned it are Miss Sarah Fuller, of the Horace Mann School for the Deaf in Boston, Massachusetts, who gave her the first lessons, and Miss Sullivan, who, by her unremitting discipline, carried on the success of these first lessons.
I would not rest satisfied until my teacher took me, for advice and assistance, to Miss Sarah Fuller, principal of the Horace Mann School.
Prescott (Story), Horace Mann (E.