--- a/doc/source/links
+++ b/doc/source/links
@@ -60,6 +60,7 @@
 .. _goal lp: logic_programming/rules/backward_chaining.html
 .. _goal syntax: pyke_syntax/krb_syntax/bc_rule.html#use-clause
 .. _goals: goal_
+.. _hg: mercurial_
 .. _home page: index.html
 .. _how to call Pyke: using_pyke.html
 .. _HTMLTemplates: http://py-templates.sourceforge.net/htmltemplate/index.html
@@ -84,6 +85,8 @@
 .. _logic programming in pyke: logic_programming/index.html
 .. _matched: `pattern matches`_
 .. _matching two patterns together: logic_programming/pattern_matching/matching_patterns.html
+.. _mercurial: http://mercurial.selenic.com/wiki/
+.. _mercurial hosting sites: http://mercurial.selenic.com/wiki/MercurialHosting
 .. _MySQL: http://www.mysql.com/
 .. _notany: pyke_syntax/krb_syntax/compound_premise.html#notany-premise
 .. _notany premise: notany_