Sir William Henry Power, A Special Mortality among Infants at Loughton…
“ Some months later the mother being out of violet powder, again used the particular powder to the infant, and at once the sores reappeared. The powder was then burned. A. D., aged three years, was attacked about Christmas 1877 by varicella. During recovery and while the pocks were dying away, she herself purchased a packet of the particular powder, which was then used for dusting the eruption about the pudenda. Almost at once the dying vesicles became sores which turned black and discharged matter; on healing they left scars. ”
