diff --git a/slidesets/originals/README.md b/slidesets/originals/README.md
index 8b137891791fe96927ad78e64b0aad7bded08bdc..a4ff94f0c3685f813cd1c2e4688f6717ea668f0d 100644
--- a/slidesets/originals/README.md
+++ b/slidesets/originals/README.md
@@ -1 +1,4 @@
+These are original .ppt .doc versions, converted to .pptx .docx versions
+via Microsoft Office online in order to use more-secure file formats.
 
+These original versions are retained for archival quality assurance (QA) purposes.