I worked for reas steverdores north to south and birkenhead,saw many cargoes , carbon black we used to get dirt money couple of pennies remember a docker coverd in carbon b,going past a cloured fella loading bags of flour on a b r s motor and tellng him to claim dirt money ,there was a irish foreman who stripped off grabbed a wet hyde rubbed it across his back to proove it was ok for the dockers ,they stunk slimmy & at times had maggotts on them another time ,unloading talc (a white powder)in big paper bags that often got burst ,an old time docker asked captain dick for dirt money his reply was its clean dirt ,so he threw it over him ,problem with all this obnoxious cargo was the fact you never had dissposable overalls you could finnish a ship of carbon black at lunch &time and be unloading meat at one oclock,all very unhygienic,,not to mention the toilets & urinals washing facillities for dockers ,i was there 1950s must have been very rough then ,All great Scousers with out a doubt joe