Henry Ernest Dudeney/Puzzles and Curious Problems/204 - The Donjon Keep Window

by : $204$

 * The Donjon Keep Window
 * In Sir Hugh de Fortibus calls his chief builder, and, pointing to a window, says:
 * "Methinks yon window is square, and measures, on the inside, one foot every way,
 * and is divided by the narrow bars into four lights, measuring half a foot on every side."


 * See our Figure $A$.


 * "I desire that another window be made higher up,
 * whose four sides shall also be each one foot,
 * but it shall be divided by bars into eight lights, whose sides shall be all equal."


 * This the craftsman was unable to do, so Sir Hugh showed him our Figure $B$, which is quite correct.


 * Dudeney-Puzzles-and-Curious-Problems-204.png


 * But he added, "I did not tell thee that the window must be square, as it is most certain it never could be."


 * Now, an ingenious correspondent, Mr. George Plant, found a flaw in Sir Hugh's conditions.
 * Something that was understood is not actually stated,
 * and the window may, as the conditions stand, be perfectly square.


 * How is it to be done?