/usr/include/ is in liborcus-dev 0.7.0+dfsg-9.
This file is owned by root:root, with mode 0o755.
..
/usr/include/liborcus-0.8/
/usr/include/liborcus-0.8/orcus/
/usr/include/liborcus-0.8/orcus/sax_parser.hpp
/usr/include/liborcus-0.8/orcus/orcus_ods.hpp
/usr/include/liborcus-0.8/orcus/ooxml/
/usr/include/liborcus-0.8/orcus/ooxml/encryption_info.hpp
/usr/include/liborcus-0.8/orcus/string_pool.hpp
/usr/include/liborcus-0.8/orcus/sax_ns_parser.hpp
/usr/include/liborcus-0.8/orcus/interface.hpp
/usr/include/liborcus-0.8/orcus/exception.hpp
/usr/include/liborcus-0.8/orcus/csv_parser.hpp
/usr/include/liborcus-0.8/orcus/stream.hpp
/usr/include/liborcus-0.8/orcus/csv_parser_base.hpp
/usr/include/liborcus-0.8/orcus/pstring.hpp
/usr/include/liborcus-0.8/orcus/css_parser.hpp
/usr/include/liborcus-0.8/orcus/global.hpp
/usr/include/liborcus-0.8/orcus/types.hpp
/usr/include/liborcus-0.8/orcus/orcus_xml.hpp
/usr/include/liborcus-0.8/orcus/orcus_xls_xml.hpp
/usr/include/liborcus-0.8/orcus/format_detection.hpp
/usr/include/liborcus-0.8/orcus/zip_archive.hpp
/usr/include/liborcus-0.8/orcus/zip_archive_stream.hpp
/usr/include/liborcus-0.8/orcus/parser_global.hpp
/usr/include/liborcus-0.8/orcus/orcus_xlsx.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/
/usr/include/liborcus-0.8/orcus/spreadsheet/factory.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/shared_strings.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/import_interface.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/styles.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/sheet.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/data_table.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/types.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/document.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/global_settings.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/sheet_properties.hpp
/usr/include/liborcus-0.8/orcus/spreadsheet/export_interface.hpp
/usr/include/liborcus-0.8/orcus/base64.hpp
/usr/include/liborcus-0.8/orcus/orcus_gnumeric.hpp
/usr/include/liborcus-0.8/orcus/measurement.hpp
/usr/include/liborcus-0.8/orcus/cell_buffer.hpp
/usr/include/liborcus-0.8/orcus/sax_parser_base.hpp
/usr/include/liborcus-0.8/orcus/env.hpp
/usr/include/liborcus-0.8/orcus/xml_namespace.hpp
/usr/include/liborcus-0.8/orcus/sax_token_parser.hpp
/usr/include/liborcus-0.8/orcus/tokens.hpp
/usr/include/liborcus-0.8/orcus/dom_tree.hpp
/usr/include/liborcus-0.8/orcus/xml_structure_tree.hpp
/usr/include/liborcus-0.8/orcus/orcus_csv.hpp