diff --git a/Library/tips.json b/Library/tips.json
index fc8b5d26c201a312f0d002156242682aecd03ae6..f61fc61994278ef96a56cf6a3675dc4dfa877b80 100644
--- a/Library/tips.json
+++ b/Library/tips.json
@@ -1,4 +1,5 @@
 {"tips":[
+"The name of the Nabla (∇) symbol comes, by reason of its shape, from the Hellenistic Greek word νάβλα for a Phoenician harp.",
 "Hurwitz surfaces are compact Riemann surfaces with exactly 84(g-1) automorphisms where g is the genus of the surface.",
 "Regular tetrahedra do not tile <i>R<sup>3</sup></i>.",
 "Splitting the faces of a cube into pairs of rectangles of alternating orientation yields a dodecahedron.",