diff --git a/src/h5/t_readwrite.h b/src/h5/t_readwrite.h
index 21a5e8b..00e2502 100644
--- a/src/h5/t_readwrite.h
+++ b/src/h5/t_readwrite.h
@@ -17,6 +17,39 @@ H5t_add_mesh (
 	h5_file * f
 	);
 
+h5_id_t
+H5t_add_level (
+	h5_file * f
+	);
+
+h5_size_t
+H5t_add_num_vertices (
+	h5_file * f,
+	const h5_size_t num
+	);
+
+h5_id_t
+H5t_store_vertex (
+	h5_file * f,
+	const h5_id_t id,
+	const h5_float64_t P[3]
+	);
+
+h5_size_t
+H5t_add_num_tets (
+	h5_file * f,
+	const h5_size_t num
+	) ;
+
+h5_id_t
+H5t_store_tet (
+	h5_file * f,
+	const h5_id_t tet_id,		/*!< global tetrahedron id	*/
+	const h5_id_t parent_id,	/*!< global parent id
+					     if level \c >0 else \c -1	*/
+	const h5_id_t vertex_ids[4]	/*!< tuple with vertex id's	*/
+	);
+
 h5_id_t
 _h5t_open_mesh (
 	h5_file * f