Yes, the consensus during my time is that the shoddy handiwork of Stephen Goldner's cannery was at least partially to blame. There was a great deal of suspicion, once some of the tins were found, that they weren't soldered properly and that the food would have gone bad. And, of course, the lead.

[ He nods to the other man. Distressing as it is to confirm such terrible findings, he's glad to at least be able to give Goodsir some relief from the questions that must have been haunting him. ]

No one in my time knows exactly how much of a role the lead might have played, but the levels in Hartnell's remains were much higher than anyone expected to find.