Abraham de Vries, Portrait of an unknown man, possibly the merchant Adriaen van der Tock (158485-1661), portrait painting visual material wood oil, Standing rectangular portrait of the Rotterdam merchant Adriaen van der Tock (friend of Abraham de Vries and assistant of Johan van der Veeken) previously identified as mr Hendrik Rosa ( Roos) secretary of Rotterdam Half-way to the right. Mustache goatee flat pleated large white collar white cuff of right arm visible dark garment. Reverse: flat parquet Rotterdam Hendrik Roos Hendrick Rosa Abraham van der Tuck Abraham of the Tocq r?gence.