private function addToNoahList( Element $elt ) {
		$noahKey = $elt->getNoahKey();
		$table =& $this->noahTableStack[ count( $this->noahTableStack ) - 1 ];
		if ( !isset( $table[$noahKey] ) ) {
			$table[$noahKey] = $elt;
		} else {
			$tail = $table[$noahKey];
			while ( $tail->nextNoah ) {
				$tail = $tail->nextNoah;
			}
			$tail->nextNoah = $elt;
		}
	}