You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20131126111029" timestamp="2013-11-26T11:10:29Z" ns="0" title="Main Page" />
        <page value="20131126141033" timestamp="2013-11-26T14:10:33Z" ns="0" title="郊野守則" />
        <page value="20131126180905" timestamp="2013-11-26T18:09:05Z" ns="0" title="General Orders" />
        <page value="20131127181227" timestamp="2013-11-27T18:12:27Z" ns="0" title="The Country Code" />
        <page value="20131127184149" timestamp="2013-11-27T18:41:49Z" ns="0" title="Baden-Powell" />
        <page value="20131127184521" timestamp="2013-11-27T18:45:21Z" ns="0" title="貝登堡勳爵" />
        <page value="20131127185910" timestamp="2013-11-27T18:59:10Z" ns="0" title="Scout Motto" />
        <page value="20131127190330" timestamp="2013-11-27T19:03:30Z" ns="0" title="Scout Promise and Law" />
        <page value="20131127190905" timestamp="2013-11-27T19:09:05Z" ns="0" title="Scout Sign and Salute" />
        <page value="20131127191032" timestamp="2013-11-27T19:10:32Z" ns="0" title="Procedures of Investiture" />
      </results>
    </querypage>
  </query>
</api>