During his four - decade tenure there he restored .
During his four - decade tenure there he expanded the building and reorganized the nearly moribund institution as an independent research library specializing in American architecture prior to 1930 and nineteenth - century material culture .
During his four - decade tenure there he restored and expanded the building and reorganized the nearly moribund institution as an independent research library specializing in American architecture prior to 1930 and nineteenth - century material culture .