diff --git a/resources/public/content/Introduction.md b/resources/public/content/Introduction.md
index be73b46..7a2ea63 100644
--- a/resources/public/content/Introduction.md
+++ b/resources/public/content/Introduction.md
@@ -1,21 +1,66 @@
-# Welcome to the Levellers Wiki
+# Welcome to Smeagol!
 
-This is a sort of loose online thinktank for the radical left in rural Scotland.
+Smeagol is a simple Wiki engine inspired by [Gollum](https://github.com/gollum/gollum/wiki). Gollum is a Wiki engine written in Ruby, which uses a number of simple text formats including [Markdown](http://daringfireball.net/projects/markdown/), and which uses [Git](http://git-scm.com/) to provide versioning and backup. I needed a new Wiki for a project and thought Gollum would be ideal - but unfortunately it doesn't provide user authentication, which I needed, and it was simpler for me to reimplement the bits I did need in Clojure than to modify Gollum.
 
-## Latest additions
+So at this stage Smeagol is a Wiki engine written in Clojure which uses Markdown as its text format, which does have user authentication, and which uses Git as its versioning and backup system.
 
-* [[Birnam workshop]]
-* [[Holding size]]
-* [[Local Government: key policy issues]]
+## Status
 
-## Everything is new
+Smeagol is now a fully working small Wiki engine, and meets my own immediate needs. There are some obvious
+things which could be improved - see **TODO** list below - but it works now and doesn't seem to have any major problems.
 
-And in fact there's not much here yet. The software is also new and may break; if it does, please contact [[Simon]].
+## Markup syntax
 
-## Come and join in
+Smeagol uses the Markdown format as provided by [markdown-clj](https://github.com/yogthos/markdown-clj), with the addition that anything enclosed in double square brackets, \[\[like this\]\], will be treated as a link into the wiki itself.
 
-This isn't an 'anybody can edit it' wiki; it's a bunch of people all of whom more or less know each other, trying to get a consistent policy platform together. But we aren't seeking to be exclusive. If you'd like to join the editing group, please contact [[Simon]].
+## Security and authentication
 
-## Please feel free to use our ideas
+Security is now greatly improved. There is a file called *passwd* in the *resources* directory, which contains a clojure map which maps usernames to maps with plain-text passwords and emails thus:
 
-This is not a party political wiki, although some of us may be members of the Greens, the SNP, or other parties. We'd be very pleased if any party adopted policy we develop.
\ No newline at end of file
+    {:admin {:password "admin" :email "admin@localhost"}
+     :adam {:password "secret" :email "adam@localhost"}}
+
+that is to say, the username is a keyword and the corresponding password is a string. However, since version 0.5.0, users can now change their own passwords, and when the user changes their password their new password is encrypted using the [scrypt](http://www.tarsnap.com/scrypt.html) one-way encryption scheme. The password file is now no longer either in the *resources/public* directory so cannot be downloaded through the browser, nor in the git archive to which the Wiki content is stored, so that even if that git archive is remotely clonable an attacker cannot get the password file that way.
+
+There's still no mechanism to add a new user to the system through the user interface; you do sill have to do that by editing the password file in an editor.
+
+## Todo
+
+* Image (and other media) upload;
+* Improved editor. The editor is at present very primitive - right back from the beginnings of the Web. It would be nice to have a rich embedded editor like [Hallo](https://github.com/bergie/hallo) or [Aloha](http://aloha-editor.org/Content.Node/index.html) but I haven't (yet) had time to integrate them!
+* Transform diff output to HTML to show changes in a more user friendly format;
+* Mechanism to add users through the user interface;
+
+## License
+
+Copyright © 2014-2015 Simon Brooke. Licensed under the GNU General Public License,
+version 2.0 or (at your option) any later version. If you wish to incorporate
+parts of Smeagol into another open source project which uses a less restrictive
+license, please contact me; I'm open to dual licensing it.
+
+## Prerequisites
+
+You will need [Leiningen][1] 2.0 or above installed.
+
+[1]: https://github.com/technomancy/leiningen
+
+## Running
+
+To start a web server for the application, run:
+
+    lein ring server
+
+or more probably
+
+	  nohup lein ring server > smeagol.log &
+
+Alternatively, if you want to deploy to a servlet container (which I would strongly recommend), the simplest thing is to run:
+
+    lein ring uberwar
+
+(a command which I'm sure Smeagol would entirely appreciate) and deploy the resulting war file.
+
+
+## Editing the framing content
+
+You can edit the [[\_left-bar]], the [[\_edit-left-bar]], and the [[\_header]].