Some good life advice: don’t let anyone take a picture of you taking snuff, unless you want to be immortalized as a Victorian nose-picker.
Snuff is a form of tobacco ground into a fine powder, taken by snorting a little pinch up one’s nose. In the 18th and 19th centuries, it was a luxury only the rich could afford.
So in these pictures, the posh ladies are trying to demonstrate their social standing by posing with a status symbol. But by trying to look more important than the inferior tobacco-smoking peasants, they just ended up looking like their snooty noses were teeming with boogers.