diff --git a/97.md b/97.md
index a1c8eb0ed..759bb16d8 100644
--- a/97.md
+++ b/97.md
@@ -1,3 +1,4 @@
 - [[Magnetic launchers]]
 - [[Magnets]] in general?
   * (I associate concepts to numbers (mostly primes, but not always) as a mnemonic device and practice -- see [[Flancia pattern language]] for more.)
+  * (I found this concept near both 79 and 97 in a whiteboard.)