# File lib/twitter/base.rb, line 81
    def direct_messages(since=nil)
      path = 'direct_messages.xml'
      since.nil? ? 1 : path << "?since=#{CGI.escape(since.to_s)}"
      doc = request(path, { :auth => true })
      (doc/:direct_message).inject([]) { |dms, dm| dms << DirectMessage.new_from_xml(dm); dms }
    end