diff --git a/README_proximity_effect.md b/README_proximity_effect.md
new file mode 100644
index 0000000..98ff87a
--- /dev/null
+++ b/README_proximity_effect.md
@@ -0,0 +1,8 @@
+The software in the proximity_effect branch is compiled in exactly the 
+same way as the original SACAMOS software. 
+
+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.
+
--
libgit2 0.21.2