The New York Public Library has released nearly 200,000 public-domain items from its special collections. Check out the home page here. Some of my favorite collections are those of the so-called cigarette cards : trade cards issued by tobacco manufacturers to stiffen cigarette packaging and advertise cigarette brands.
The series ‘This Age of Power & Wonder’ must have been issued in South Africa, since the cards have both English and Afrikaans on the back of the card ! I just do not recall ever seeing cigarette cards in South Africa when I was growing up.