1 files changed, 3 insertions, 1 deletions
diff --git a/perlapi.c b/perlapi.c
index d15afec96f..19b1b3e0f2 100644
--- a/perlapi.c
+++ b/perlapi.c
@@ -18,7 +18,9 @@
  *
  * Up to the threshold of the door there mounted a flight of twenty-seven
  * broad stairs, hewn by some unknown art of the same black stone.  This
- * was the only entrance to the tower.
+ * was the only entrance to the tower; ...
+ *
+ *     [p.577 of _The Lord of the Rings_, III/x: "The Voice of Saruman"]
  *
  */