diff --git a/en_US.ISO8859-1/books/handbook/ports/chapter.sgml b/en_US.ISO8859-1/books/handbook/ports/chapter.sgml
index 3dc24bd7d5..9736964740 100644
--- a/en_US.ISO8859-1/books/handbook/ports/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/ports/chapter.sgml
@@ -421,11 +421,13 @@ docbook                     =
 	</row>
 
         <row><entry>&gt;</entry><entry>The installed version is newer
-          than the one found in the local ports tree. (local ports
-          tree is probably out of date)</entry></row>
+          than the one found in the local ports tree. (The local ports
+          tree is probably out of date.)</entry></row>
 
         <row><entry>?</entry><entry>The installed package cannot be
-        found in the ports index.</entry></row>
+	  found in the ports index.  (This can happen, for instance, if an
+	  installed port is removed from the ports collection or
+	  renamed.)</entry></row>
 
         <row><entry>*</entry><entry>There are multiple versions of the
         package.</entry></row>