diff --git a/web/gui/src/main/webapp/_sdh/overlaywork/README.txt b/web/gui/src/main/webapp/_sdh/overlaywork/README.txt
new file mode 100644
index 0000000..d7dcbec
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+++ b/web/gui/src/main/webapp/_sdh/overlaywork/README.txt
@@ -0,0 +1,4 @@
+NOTE:
+
+This directory is putting under revision control some key files from
+an example stand-alone app, as I develop the topology overlay functionality.