diff --git a/book/helper_code/intro.md b/book/helper_code/intro.md
index 6e8f8e7..b06a321 100644
--- a/book/helper_code/intro.md
+++ b/book/helper_code/intro.md
@@ -1,6 +1,7 @@
 # Scripts for automating workflow
 
-This chapter contains a few scripts which can be useful in the book-editing process:
+This chapter contains a few scripts which can be useful in the book-editing process, all of which are scripts and/or files stored in other repositories  (they are _not_ Sphinx extensions).
+
  - [LaTeX to markdown conversion](tex_md_converter) to convert a LaTeX file into jupyter-book compatible markdown.
  - [Snippitall](Snippitall) to insert the same code snippet at a certain point in each md file in a specific folder and all subfolder. 
  - [Snippitonce](Snippitonce) to insert the same code snippet at a certain point in each md file only in a specific folder.