It was Hans Coper who died from amyothropic lateral sclerosis which
was, as you say, as a result of working with manganese - not only the
firing - he achieved beautiful effects by working back into manganese
slips and oxides, without a mask. At the same time, though, Lucie Rie,

Thanks for that. I ahve taken care in application and the rubbing off but I
think it will go out the back and keep the barium company.

Uncle John