/usr/include/gamera/graph/ is in python-gamera-dev 3.3.3-2+deb7u1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gamera/graph/bfsdfsiterator.hpp
/usr/include/gamera/graph/edge.hpp
/usr/include/gamera/graph/edgenodeiterator.hpp
/usr/include/gamera/graph/graph.hpp
/usr/include/gamera/graph/graph_common.hpp
/usr/include/gamera/graph/graphdata.hpp
/usr/include/gamera/graph/graphdataderived.hpp
/usr/include/gamera/graph/graphdatapyobject.hpp
/usr/include/gamera/graph/node.hpp
/usr/include/gamera/graph/nodetraverseiterator.hpp
/usr/include/gamera/graph/shortest_path.hpp
/usr/include/gamera/graph/spanning_tree.hpp
/usr/include/gamera/graph/subgraph_root.hpp