here is some more information about the companies that employed carters.
I cannot take credit for it as it was passed to me by a very knowledgeable chap
There were many employed by Bulloughs
& Langs Bridges also other large manufacturers
like Broad Oak and such employed them or used them
to take goods to and from the Rail Station, when I was a kid
we used to wait at the bottom of Adelaide st for Bulloughs
horses. The drovers would lift us on to their backs, and we
would hold on to their manes till we got to the big field
now occupied by the college of knowledge in Sandy Lane
When I started at Langs just as the war ended they still used a
self employed carter to bring special sands from the railway
sidings in Charter St to, Langs moulding shop.
I hope this helps you.