/usr/include/OGRE/Paging/ is in libogre-1.9-dev 1.9.0+dfsg1-7+b4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/OGRE/Paging/OgreGrid2DPageStrategy.h
/usr/include/OGRE/Paging/OgreGrid3DPageStrategy.h
/usr/include/OGRE/Paging/OgrePage.h
/usr/include/OGRE/Paging/OgrePageConnection.h
/usr/include/OGRE/Paging/OgrePageContent.h
/usr/include/OGRE/Paging/OgrePageContentCollection.h
/usr/include/OGRE/Paging/OgrePageContentCollectionFactory.h
/usr/include/OGRE/Paging/OgrePageContentFactory.h
/usr/include/OGRE/Paging/OgrePageFileFormats.h
/usr/include/OGRE/Paging/OgrePageManager.h
/usr/include/OGRE/Paging/OgrePageStrategy.h
/usr/include/OGRE/Paging/OgrePagedWorld.h
/usr/include/OGRE/Paging/OgrePagedWorldSection.h
/usr/include/OGRE/Paging/OgrePaging.h
/usr/include/OGRE/Paging/OgrePagingPrerequisites.h
/usr/include/OGRE/Paging/OgreSimplePageContentCollection.h