diff --git a/README.md b/README.md
index d90c108..9e8c2ce 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,8 @@ project* consists of four smaller projects which are:
 - [Midpoint](https://git.abbether.net/return-to-ritherdon/relay)
 - [Eyes and
   Ears](https://git.abbether.net/return-to-ritherdon/eyes-and-ears)
+  (this is a non-essential project and excluded from the diagrams
+  below to keep things simple -- at this introductory stage)
   
 ![Main Project Overview](attachments/return-to-ritherdon-project-overview.png)