Callender was born in Cambridge, Massachusetts, and studied at Cambridge Rindge and Latin School and Boston University, before becoming the first African American to study at Westminster Theological Seminary.
Callender was born in Cambridge, Massachusetts. Callender was studied at Cambridge Rindge. This was before. Callender was studied at Latin School and Boston University. This was before. Callender was becoming the first African American. This was to study at Westminster Theological Seminary.