diff --git a/Kernel_23/doc/Kernel_23/CGAL/Iso_rectangle_2.h b/Kernel_23/doc/Kernel_23/CGAL/Iso_rectangle_2.h
index 05f6d6c0baa..53f64846fca 100644
--- a/Kernel_23/doc/Kernel_23/CGAL/Iso_rectangle_2.h
+++ b/Kernel_23/doc/Kernel_23/CGAL/Iso_rectangle_2.h
@@ -191,7 +191,7 @@ Kernel::FT area() const;
 /*!
 returns a bounding box containing `r`. 
 */ 
-Bbox bbox() const; 
+Bbox_2 bbox() const;
 
 /*!
 returns the iso-oriented rectangle obtained by applying `t` on 
diff --git a/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Stop_above_cost_threshold.h b/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Stop_above_cost_threshold.h
index febbdac29b4..8d2cc594b5d 100644
--- a/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Stop_above_cost_threshold.h
+++ b/Polyline_simplification_2/include/CGAL/Polyline_simplification_2/Stop_above_cost_threshold.h
@@ -30,7 +30,7 @@ namespace Polyline_simplification_2
 
 
 /// This class is a stop predicate returning `true` when the cost for 
-/// simplifying a vertex is smaller than a certain threshold.
+/// simplifying a vertex is greater than a certain threshold.
 ///
 /// \cgalModels `PolylineSimplificationStopPredicate`.
 class Stop_above_cost_threshold
diff --git a/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt b/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
index d3d1c4d39ac..acecd731fff 100644
--- a/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
+++ b/Surface_mesh/doc/Surface_mesh/Surface_mesh.txt
@@ -341,7 +341,7 @@ refering to the right vertices.
 \section sectionSurfaceMeshImplementation Implementation Details
 
 As integer type for the indices we have chosen `boost::uint32_t`. On 64 bit operating systems they
-take only have the size of a pointer. They still allow to have meshes with 2 billion elements.
+take only half the size of a pointer. They still allow to have meshes with 2 billion elements.
 
 We use `std::vector` for storing properties. So by accessing the adress 
 of the 0th element of a property map you can access the underlying