Business was Thomas Crosby & Son at North Wall Quay,(1850/60) Sir John Rogerson Quay(1860 on) and Brunswick St (all Dublin) at different times and lived in Amiens Street (have been in that house). Just looked on Google map for Britain Street - nearest reference is Britain Quay (on the River Liffey) which is a continuation of Sir John Rogerson Quay(North Wall Quay is diagonally opposite). Connections ??? Irish research is haard work. Bill.