Hi.
As suggested in a few previous postings that Dam Bank and Cupar Street being the same street, is more than likely the case. Dam Bank may have been it's nick-name until the Belfast Corporation took over the street and called it Cupar Street.
If my memory serves me right, there was a linen mill in the Cupar Street area and if so there would be a dam for soaking the flax.
In the street directories a high percentage, if not all in those days, of residents were mill workers and would live in houses that belonged to the mill owners. A lot of those houses, housed two families, one downstairs, one upstairs. An outside toilet in the back-yard served both families.
Regards,
Dixie