two directory entries that could fit :
Pettigrew & Oulton 1843
  Thomas Cooper, 40 Mary street , engraver & cooper plate printer
   
   the street listing in this directory show the address is shared with a
   Mr. Roger Cooper (no trade or occupation included)
Thom's 1848
  Thomas Cooper, 59 Grafton St - engraver & lithogr.
    listed in the trades index as 'engraver, stationer, and fancy wafer maker'
no sign of him operating a business at either address in either 1834 or 1850
Shane