Yes this is curious as it seems clear that he was a shop keeper but the portrait painted in 1818 by Charles Howard Hodges is definitely of Thomas and Hannah and they look very affluent.

The current owner of the portraits tells me that they are clearly labelled to say that Thomas himself carved the frames and that he was also the art dealer for Charles Howard Hodges who was a famous artist at the time. So was Thomas a draper or an art dealer? I wondered if the trade directories might list the businesses carried out at 98 and 100 Kalverstraat in the 1830s, or alternatively have records of Thomas and Matthew Jackson in business in Amsterdam in 1830s.