diff --git a/README.org b/README.org
index 8935c0f..39ad747 100644
--- a/README.org
+++ b/README.org
@@ -261,6 +261,9 @@
      configuration/. 
    
 ** Develop the query bottom-up
+   The main codeql library for csharp documentation is [[https://codeql.github.com/docs/codeql-language-guides/codeql-library-for-csharp/][online]].  A table mapping C#
+   syntax to CodeQL classes, autogenerated from those docs, is [[https://htmlpreview.github.io/?https://github.com/hohn/codeql-intro-csharp/blob/master/ast-table.html][here.]]
+
    1. Identify the /source/ part of the 
       : Console.ReadLine()?.Trim() ?? string.Empty;
       expression, the =Console.ReadLine()= call.