Henry Ernest Dudeney/Modern Puzzles/58 - The Two Fours/Historical Note

Historical Note on $58$. - The Two Fours

 * I am perpetually receiving inquiries about the old "Four Fours" puzzle.
 * I published it in $1899$, but have since found that it first appeared in the first volume of Knowledge ($1881$).
 * It has since been dealt with at some length by various writers.