/usr/include/regina-normal/census/ is in regina-normal-dev 4.96-2.1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/regina-normal/census/dim2census.h
/usr/include/regina-normal/census/dim2edgepairing.h
/usr/include/regina-normal/census/dim2gluingperms.h
/usr/include/regina-normal/census/dim2gluingpermsearcher.h
/usr/include/regina-normal/census/ncensus.h
/usr/include/regina-normal/census/nfacepairing.h
/usr/include/regina-normal/census/ngenericfacetpairing-impl.h
/usr/include/regina-normal/census/ngenericfacetpairing.h
/usr/include/regina-normal/census/ngenericfacetpairing.tcc
/usr/include/regina-normal/census/ngenericgluingperms-impl.h
/usr/include/regina-normal/census/ngenericgluingperms.h
/usr/include/regina-normal/census/ngenericgluingperms.tcc
/usr/include/regina-normal/census/ngluingperms.h
/usr/include/regina-normal/census/ngluingpermsearcher.h