diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index 37b04a2f2..e4aec2f8d 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -46,7 +46,7 @@
 .ds f0 \*(vr
 .ds f1 \" empty
 .\"DO NOT REMOVE NH_DATESUB .ds f2 DATE(%B %-d, %Y)
-.ds f2 July 16, 2024
+.ds f2 July 29, 2024
 .
 .\" A note on some special characters:
 .\" \(lq = left double quote
@@ -533,6 +533,11 @@ Rather than a specific type of monster, this marks the last known
 location of an invisible or otherwise unseen monster.
 Note that the monster could have moved.
 The \(oqs\(cq, \(oqF\(cq, and \(oqm\(cq commands may be useful here.
+.lp \f(CR1\fP-\f(CR5\fP
+The digits 1 through 5 may be displayed, marking unseen monsters sensed
+via the \fIWarning\fP attribute.
+Less dangerous monsters are indicated by lower values, more dangerous by
+higher values.
 .pg
 You need not memorize all these symbols; you can ask the game what any
 symbol represents with the \(oq/\(cq command (see the next section for
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index 0ef3cdc1b..5d66c9c1c 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -48,7 +48,7 @@
 \author{Original version - Eric S. Raymond\\
 (Edited and expanded for 3.7.0 by Mike Stephenson and others)}
 %DO NOT REMOVE NH_DATESUB \date{DATE(%B %-d, %Y)}
-\date{July 16, 2024}
+\date{July 29, 2024}
 
 \maketitle
 
@@ -587,6 +587,11 @@ Rather than a specific type of monster, this marks the last known
 location of an invisible or otherwise unseen monster.
 Note that the monster could have moved.
 The `{\tt s}', `{\tt F}', and `{\tt m}' commands may be useful here.
+\item[\tb{1-5}]
+The digits 1 through 5 may be displayed, marking unseen monsters sensed
+via the {\it Warning\/} attribute.
+Less dangerous monsters are indicated by lower values, more dangerous by
+higher values.
 
 \elist
 %.pg