diff --git a/doc/RETRO-Book.md b/doc/RETRO-Book.md
index b0c4de0..55c47b2 100644
--- a/doc/RETRO-Book.md
+++ b/doc/RETRO-Book.md
@@ -3072,6 +3072,17 @@ The headers between `{{` and `---reveal---` are then hidden from
 the dictionary, leaving only the headers between `---reveal---`
 and `}}` exposed.
 
+If you wish to hide all headers in a `{{` ... `}}` block, leave
+out the `---reveal---`.
+
+```
+{{
+  :a #3 ;
+  : b a dup * ;
+}}
+```
+
+
 ## Notes
 
 This only affects word visibility within the scoped area. As an
@@ -3090,6 +3101,9 @@ example:
 In this, after `}}` closes the area, the `:a #2 ;` is hidden and
 the `s:evaluate` will find the `:a #1 ;` when `b` is run.
 
+If you have a `---reveal---` with no definitions following, you
+will experience memory corruption.
+
 # The Stacks
 
 The stacks are a defining feature of Forth. They are are used
diff --git a/doc/book/techniques/lexical-scope b/doc/book/techniques/lexical-scope
index 4d6dd0b..0c192cb 100644
--- a/doc/book/techniques/lexical-scope
+++ b/doc/book/techniques/lexical-scope
@@ -23,6 +23,17 @@ The headers between `{{` and `---reveal---` are then hidden from
 the dictionary, leaving only the headers between `---reveal---`
 and `}}` exposed.
 
+If you wish to hide all headers in a `{{` ... `}}` block, leave
+out the `---reveal---`.
+
+```
+{{
+  :a #3 ;
+  : b a dup * ;
+}}
+```
+
+
 ## Notes
 
 This only affects word visibility within the scoped area. As an
@@ -40,3 +51,6 @@ example:
 
 In this, after `}}` closes the area, the `:a #2 ;` is hidden and
 the `s:evaluate` will find the `:a #1 ;` when `b` is run.
+
+If you have a `---reveal---` with no definitions following, you
+will experience memory corruption.
diff --git a/doc/html/chapters/techniques/lexical-scope.html b/doc/html/chapters/techniques/lexical-scope.html
index ca790a2..7b92e3f 100644
--- a/doc/html/chapters/techniques/lexical-scope.html
+++ b/doc/html/chapters/techniques/lexical-scope.html
@@ -66,6 +66,15 @@ The headers between <span class="tt">{{</span> and <span class="tt">---reveal---
 the dictionary, leaving only the headers between <span class="tt">---reveal---</span>
 and <span class="tt">}}</span> exposed.
 <br/><br/>
+If you wish to hide all headers in a <span class="tt">{{</span> ... <span class="tt">}}</span> block, leave
+out the <span class="tt">---reveal---</span>.
+<br/><br/>
+<span class='codeblock'><span class="tt">```</span><br/><span class="tt">{{ </span><br/>
+<span class="tt">&nbsp;&nbsp;<span class='colon'>:a</span> <span class='num'>#3</span> <span class='imm'>;</span> </span><br/>
+<span class="tt">&nbsp;&nbsp;<span class='colon'>:</span> b a <span class='prim'>dup</span> <span class='prim'>*</span> <span class='imm'>;</span> </span><br/>
+<span class="tt">}} </span><br/>
+<span class="tt">```</span></span><br/><br/>
+<br/><br/>
 <span class="h2">Notes</span>
 <br/><br/>
 This only affects word visibility within the scoped area. As an
@@ -81,5 +90,8 @@ example:
 <span class="tt">```</span></span><br/><br/>
 In this, after <span class="tt">}}</span> closes the area, the <span class="tt">:a #2 ;</span> is hidden and
 the <span class="tt">s:evaluate</span> will find the <span class="tt">:a #1 ;</span> when <span class="tt">b</span> is run.
+<br/><br/>
+If you have a <span class="tt">---reveal---</span> with no definitions following, you
+will experience memory corruption.
 </p>
 </body></html>