EPHEMERA has been included as most puzzle collections
include related ephemera which, whilst not strictly puzzles, need to be classified
as part of the collection.
There are examples of picture puzzles, word puzzles etc. which are on objects
such as a plates, or are of such antiquity that the object deserves a place
within any good collection of mechanical puzzles.
An example is the large sheet of riddles printed in London c.1840 from which these two examples are taken.