diff --git a/2020/ferguson2/README.md b/2020/ferguson2/README.md
index 0bd7880b4..b7470f4df 100644
--- a/2020/ferguson2/README.md
+++ b/2020/ferguson2/README.md
@@ -663,7 +663,7 @@ that.
 [1992 Worst Abuse of the Rules]: http://www.ioccc.org/1992/nathan/nathan.hint
 [1998 ASCII / Morse code translator]: http://www.ioccc.org/1998/dorssel/dorssel.hint
 [2014 Morse audio transcoder]: http://www.ioccc.org/2014/vik/README.md
-[Enigma Message Procedures]: http://users.telenet.be/d.rijmenants/en/enigmaproc.htm
+[Enigma Message Procedures]: https://web.archive.org/web/20200710094321/http://users.telenet.be/d.rijmenants/en/enigmaproc.htm
 [Interactive Enigma Machine]: http://enigmaco.de/enigma/enigma.html
 [enigma.1]: enigma.1
 [recode.1]: recode.1
@@ -673,9 +673,9 @@ that.
 [obfuscation.md]: obfuscation.md
 [obfuscation.txt]: obfuscation.txt
 [obfuscation.key]: obfuscation.key
-[Tony Sale's pages on The Enigma cipher machine]: http://www.codesandciphers.co.uk/enigma/index.htm
-[Technical Details of the Enigma Machine]: http://users.telenet.be/d.rijmenants/en/enigmatech.htm
-[The German Enigma Cipher Machine]: http://users.telenet.be/d.rijmenants/en/enigma.htm
+[Tony Sale's pages on The Enigma cipher machine]: https://web.archive.org/web/20200621180323/http://www.codesandciphers.co.uk/enigma/index.htm
+[Technical Details of the Enigma Machine]: https://web.archive.org/web/20200710094303/http://users.telenet.be/d.rijmenants/en/enigmatech.htm
+[The German Enigma Cipher Machine]: https://web.archive.org/web/20200710094243/http://users.telenet.be/d.rijmenants/en/enigma.htm
 [How the Enigma was Set Up and Operated]: http://www.ellsbury.com/enigma3.htm
 [https://ioccc.xexyl.net/2020/enigma]: https://ioccc.xexyl.net/2020/enigma
 
diff --git a/2020/ferguson2/enigma.1 b/2020/ferguson2/enigma.1
index 3598e55be..775dbaa6e 100644
--- a/2020/ferguson2/enigma.1
+++ b/2020/ferguson2/enigma.1
@@ -68,14 +68,14 @@ Written by Cody Boone Ferguson for IOCCC 2020 (the 27th IOCCC).
 .PP
 \fB\<https://ioccc.xexyl.net/2020/enigma\>\fP The 27th IOCCC 'Most enigmatic'.
 .PP
-\fB\<http://users.telenet.be/d.rijmenants/en/enigmaproc.htm\>\fP Enigma Message Procedures for the Heer (Army), Luftwaffe (Air Force) and Kriegsmarine (Navy).
+\fB\<https://web.archive.org/web/20200710094321/http://users.telenet.be/d.rijmenants/en/enigmaproc.htm\>\fP Enigma Message Procedures for the Heer (Army), Luftwaffe (Air Force) and Kriegsmarine (Navy).
 .PP
 \fB\<http://enigmaco.de/enigma/enigma.html\>\fP Online interactive Enigma simulator.
 .PP
-\fB\<http://www.codesandciphers.co.uk/enigma/index.htm\>\fP Tony Sale's (original curator of the Bletchley Park Museum) pages on The Enigma cipher machine.
+\fB\<https://web.archive.org/web/20200621180323/http://www.codesandciphers.co.uk/enigma/index.htm\>\fP Tony Sale's (original curator of the Bletchley Park Museum) pages on The Enigma cipher machine.
 .PP
-\fB\<http://users.telenet.be/d.rijmenants/en/enigmatech.htm\>\fP Technical Details of the Enigma Machine.
+\fB\<https://web.archive.org/web/20200710094303/http://users.telenet.be/d.rijmenants/en/enigmatech.htm\>\fP Technical Details of the Enigma Machine.
 .PP
-\fB\<http://users.telenet.be/d.rijmenants/en/enigma.htm\>\fP The German Enigma Cipher Machine.
+\fB\<https://web.archive.org/web/20200710094243/http://users.telenet.be/d.rijmenants/en/enigma.htm\>\fP The German Enigma Cipher Machine.
 .PP
 \fB\<http://www.ellsbury.com/enigma3.htm\>\fP How the Enigma was Set Up and Operated.
diff --git a/2020/ferguson2/recode.html b/2020/ferguson2/recode.html
index 5e4c71960..207cf2fcc 100644
--- a/2020/ferguson2/recode.html
+++ b/2020/ferguson2/recode.html
@@ -56,7 +56,7 @@ good chocolate and could use a delicious <a href="chocolate-cake.html">Double-la
 <li><p><a href="#conclusion">Usage conclusion</a></p></li>
 <li><p><a href="#additions">Example additions</a></p></li>
 <li><p><a href="#exampleuses">Example uses</a></p></li>
-<li><p><a href="#cake">Delicious Enigma: Double-layered Chocolate Fudge Cake</a></p></li>
+<li><p><a href="#cake">Deliciously Enigmatic: Double-layered Chocolate Fudge Cake</a></p></li>
 </ul>
 
 <h1><a name="recode" href="#toc">What is recode and why is it recommended?</a></h1>
@@ -540,7 +540,7 @@ anyway?</p></li>
 </ul>
 
 
-<h1><a name="cake" href="#toc">Delicious Enigma: Double-layered Chocolate Fudge Cake</a></h1>
+<h1><a name="cake" href="#toc">Deliciously Enigmatic: Double-layered Chocolate Fudge Cake</a></h1>
 
 <p>As I was making the above silly list something occurred to me. My other entries
 this year include a recipe for a wonderful double-layered chocolate fudge cake
diff --git a/2020/ferguson2/recode.md b/2020/ferguson2/recode.md
index bbd6a4c65..e32ea3618 100644
--- a/2020/ferguson2/recode.md
+++ b/2020/ferguson2/recode.md
@@ -39,7 +39,7 @@ Alternatively if you just want the recipe you could look at my Snake entry
 
 -   [Example uses](#exampleuses)
 
--   [Delicious Enigma: Double-layered Chocolate Fudge Cake](#cake)
+-   [Deliciously Enigmatic: Double-layered Chocolate Fudge Cake](#cake)
 
 
 # <a name="recode" href="#toc">What is recode and why is it recommended?</a>
@@ -515,7 +515,7 @@ anyway?
 
 * Best idea: try the below experiment!
 
-# <a name="cake" href="#toc">Delicious Enigma: Double-layered Chocolate Fudge Cake</a>
+# <a name="cake" href="#toc">Delicious Enigmatic: Double-layered Chocolate Fudge Cake</a>
 
 As I was making the above silly list something occurred to me. My other entries
 this year include a recipe for a wonderful double-layered chocolate fudge cake