diff --git a/examples/Griffin2011/README.rst b/examples/Griffin2011/README.rst
index 8ed864e..a21a7f2 100644
--- a/examples/Griffin2011/README.rst
+++ b/examples/Griffin2011/README.rst
@@ -30,3 +30,4 @@ If you don't have much time, remove the following lines from the parameter YAML-
 This is one the hand a projection that yields a correct field and norm value.
 However, it takes very long.
 Go instead with a faster solution in paraview (.pvsm file in paraview directory).
+The line plot was done by gnuplot.