private function readClientAnchor()
    {
        $length = Xls::getInt4d($this->data, $this->pos + 4);
        $recordData = substr($this->data, $this->pos + 8, $length);

        // move stream pointer to next record
        $this->pos += 8 + $length;

        // offset: 2; size: 2; upper-left corner column index (0-based)
        $c1 = Xls::getUInt2d($recordData, 2);

        // offset: 4; size: 2; upper-left corner horizontal offset in 1/1024 of column width
        $startOffsetX = Xls::getUInt2d($recordData, 4);

        // offset: 6; size: 2; upper-left corner row index (0-based)
        $r1 = Xls::getUInt2d($recordData, 6);

        // offset: 8; size: 2; upper-left corner vertical offset in 1/256 of row height
        $startOffsetY = Xls::getUInt2d($recordData, 8);

        // offset: 10; size: 2; bottom-right corner column index (0-based)
        $c2 = Xls::getUInt2d($recordData, 10);

        // offset: 12; size: 2; bottom-right corner horizontal offset in 1/1024 of column width
        $endOffsetX = Xls::getUInt2d($recordData, 12);

        // offset: 14; size: 2; bottom-right corner row index (0-based)
        $r2 = Xls::getUInt2d($recordData, 14);

        // offset: 16; size: 2; bottom-right corner vertical offset in 1/256 of row height
        $endOffsetY = Xls::getUInt2d($recordData, 16);

        // set the start coordinates
        $this->object->setStartCoordinates(Coordinate::stringFromColumnIndex($c1 + 1) . ($r1 + 1));

        // set the start offsetX
        $this->object->setStartOffsetX($startOffsetX);

        // set the start offsetY
        $this->object->setStartOffsetY($startOffsetY);

        // set the end coordinates
        $this->object->setEndCoordinates(Coordinate::stringFromColumnIndex($c2 + 1) . ($r2 + 1));

        // set the end offsetX
        $this->object->setEndOffsetX($endOffsetX);

        // set the end offsetY
        $this->object->setEndOffsetY($endOffsetY);
    }