How is that an example of burying the lead? (I presume lede is the correct spelling, but burying lead for others to find in their drinking water amuses me.)

EDIT: saw the picture and yes. That certainly was catchy, but I the hn title is missing the subtitle: "until the black death made them commonplace".

More of a venison issue. Lede evolved from lead to avoid exactly this confusion, sometime last century.