You had cess-pits which often overflowed and were so dangerous that night soil men actually drowned in them. As immortalized by Samuel Pepys: “Going down to my cellar…I put my feet into a great heap of turds, by which I find that Mr. Turner’s house of office is full and comes into my cellar.”
Fancy means pewter and vegetables/fruit with high acidic content would have the metal leech into the food. That person would then expire. This is why tomatoes were considered poisonous for over 400 years.