/usr/include/liborcus-0.8/orcus/spreadsheet/ is in liborcus-dev 0.7.0+dfsg-9.
This file is owned by root:root, with mode 0o755.
..
/usr/include/liborcus-0.8/orcus/spreadsheet/data_table.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/document.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/export_interface.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/factory.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/global_settings.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/import_interface.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/shared_strings.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/sheet.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/sheet_properties.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/styles.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/types.hpp