diff --git a/README_proximity_effects.md b/README_proximity_effects.md
index 1da3375..dc90755 100644
--- a/README_proximity_effects.md
+++ b/README_proximity_effects.md
@@ -12,3 +12,19 @@ fasthenry will need to be installed and fasthenry executable directory
 must be in the users $PATH
 
 The SACAMOS/bin directory must also be in the users $PATH so as to be able to run write_FH_input_file which creates input files for fasthenry.
+
+PROXIMITY_EFFECT_TEST_CASES
+
+A set of proximity effect test cases may be found in the directory:
+PROXIMITY_EFFECT_TEST_CASES
+
+There are a number of sub-directories, each corresponding to a particular scenario.
+The sub-directories may contain a number of SACAMOS test runs with different 
+flags set in the input files to deomonstrate particular aspects of the model, and
+also to create comparison results with the original SACAMOS models (no use of fasthenry).
+
+The full set of test cases can be run from the PROXIMITY_EFFECT_TEST_CASES directory with the command
+
+run_test_cases
+
+The results must be viewed by going to the individual test case directories.
diff --git a/version_information.inc b/version_information.inc
index f5a1f64..1e4a03a 100644
--- a/version_information.inc
+++ b/version_information.inc
@@ -1,2 +1,2 @@
-SPICE_CABLE_MODEL_BUILDER_version="v4.1.0"
-SPICE_CABLE_MODEL_BUILDER_date="22nd October 2019"
+SPICE_CABLE_MODEL_BUILDER_version="v4.2.0"
+SPICE_CABLE_MODEL_BUILDER_date="21st December 2023"
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