private function _readContinue()
	{
		$length = self::_GetInt2d($this->_data, $this->_pos + 2);
		$recordData = $this->_readRecordData($this->_data, $this->_pos + 4, $length);

		// check if we are reading drawing data
		// this is in case a free CONTINUE record occurs in other circumstances we are unaware of
		if ($this->_drawingData == '') {
			// move stream pointer to next record
			$this->_pos += 4 + $length;

			return;
		}

		// check if record data is at least 4 bytes long, otherwise there is no chance this is MSODRAWING data
		if ($length < 4) {
			// move stream pointer to next record
			$this->_pos += 4 + $length;

			return;
		}

		// dirty check to see if CONTINUE record could be a camouflaged MSODRAWING record
		// look inside CONTINUE record to see if it looks like a part of an Escher stream
		// we know that Escher stream may be split at least at
		//		0xF003 MsofbtSpgrContainer
		//		0xF004 MsofbtSpContainer
		//		0xF00D MsofbtClientTextbox
		$validSplitPoints = array(0xF003, 0xF004, 0xF00D); // add identifiers if we find more

		$splitPoint = self::_GetInt2d($recordData, 2);
		if (in_array($splitPoint, $validSplitPoints)) {
			// get spliced record data (and move pointer to next record)
			$splicedRecordData = $this->_getSplicedRecordData();
			$this->_drawingData .= $splicedRecordData['recordData'];

			return;
		}

		// move stream pointer to next record
		$this->_pos += 4 + $length;

	}