Ropkins Family - Clerkenwell

[Harrisons]

Hello,

Looking for any information surrounding the family of Cabinet Makers and Jewellers from Clerkenwell.  Does anyone know if possible to find out information regarding their employment.  Several are listed as having own business and can trace the ropkins as cabinet makers in clerkenwell back to 1780  via a will i found and census shows family still doing this in 1901

The main names are john, Robert, George.

Also i know that their brother Joshua had a family jewellers on the Holloway road in london from 1870 until at least 1901 as listed on census throughout that time as jeweller and own business.  I know that half the family stayed in clerkenwell as cabinet makers and the other half to Islington to run a jewellers. 

If anyone knows how i can trace these businesses via apprenticeships or business records???

Help Appreciated

Many thanks