Xenu leaflet text comes from Roland Rashleigh-Berry, as
documented here, and is in the public domain:

http://www.suburbia.com.au/~fun/scn/demo/howto/970714-roland.html

The leaflet is hosted at many sites, including these:

http://www.users.wineasy.se/noname/xemuleaf.htm
http://www.holysmoke.org/sdhok/what-cos.htm