/usr/include/regina-normal/surfaces/ is in regina-normal-dev 4.96-2.1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/regina-normal/surfaces/coordregistry-impl.h
/usr/include/regina-normal/surfaces/coordregistry.h
/usr/include/regina-normal/surfaces/filterregistry-impl.h
/usr/include/regina-normal/surfaces/filterregistry.h
/usr/include/regina-normal/surfaces/flavourregistry.h
/usr/include/regina-normal/surfaces/ndisc.h
/usr/include/regina-normal/surfaces/ndisctype.h
/usr/include/regina-normal/surfaces/nnormalsurface.h
/usr/include/regina-normal/surfaces/nnormalsurfacelist.h
/usr/include/regina-normal/surfaces/normalcoords.h
/usr/include/regina-normal/surfaces/normalflags.h
/usr/include/regina-normal/surfaces/normalspec-impl.h
/usr/include/regina-normal/surfaces/normalspec.tcc
/usr/include/regina-normal/surfaces/nprism.h
/usr/include/regina-normal/surfaces/nsanstandard.h
/usr/include/regina-normal/surfaces/nsmirrored.h
/usr/include/regina-normal/surfaces/nsoriented.h
/usr/include/regina-normal/surfaces/nsorientedquad.h
/usr/include/regina-normal/surfaces/nsquad.h
/usr/include/regina-normal/surfaces/nsquadoct.h
/usr/include/regina-normal/surfaces/nsstandard.h
/usr/include/regina-normal/surfaces/nsurfacefilter.h
/usr/include/regina-normal/surfaces/nsurfacesubset.h
/usr/include/regina-normal/surfaces/nxmlfilterreader.h
/usr/include/regina-normal/surfaces/nxmlsurfacereader.h
/usr/include/regina-normal/surfaces/sfcombination.h
/usr/include/regina-normal/surfaces/sfproperties.h
/usr/include/regina-normal/surfaces/surfacefiltertype.h