diff --git a/pages/annotation.md b/pages/annotation.md
index 5d401de..882342e 100644
--- a/pages/annotation.md
+++ b/pages/annotation.md
@@ -8,5 +8,9 @@
 
 - https://www.goodannotations.com/tools/draw-on-pdf
 
+------------
+https://notes.andymatuschak.org/z8aiVRywvJYDB9gvpCDxa4KUBcKr8R4geNAiJ
+
+https://notes.andymatuschak.org/z8ZWYXFwXV38qiCgRx7zf2ySy9WCxWvcizNVr