The hours of labour for sweating work appear to be from fifteen to eighteen per diem, and "greeners" not infrequently work eighteen to twenty hours a day.

It first assisted to draw to London numbers of continental Jews, who struggled as "greeners" under sweaters for six months, until they were qualified for assistance from the Jewish Board of Guardians.

It then enabled them to set up as small masters, and sweat other "greeners" as they themselves were sweated.