Louisa Parke Costin

Two years later, Delphy and her daughters Louisa and Ann were manumitted by Elizabeth and her husband Thomas Law.

[4][5][6] After William's birth, Ann married an enslaved man at Mount Vernon with the Costin surname.

Other pioneers for schools for African Americans included Maria Becraft, John F. Cook, Laura Parke Costin, and Mary Wormley.

[9] In an article about the history of colored public schools in Georgetown and Washington, D.C., recognizing specific pioneers including Costin, Professor Frederick A. P. Barnard states: That the struggle of the colored people of the District of Columbia in securing for themselves the means of education furnishes a very instructive chapter in the history of schools.

Their courage and resolution were such, in the midst of their own great ignorance and strenuous opposition from without, that a permanent record becomes an act of justice to them.

[10]Costin established a school for African American children in her father's house on Capitol Hill in 1823.