The magician's own book, or The whole art of conjuring (1862)
Arnold, George, 1834-1865, Cahill, Frank · New York, Dick & Fitzgerald · leaf 315
28. PUZZLE OE THE TWO FATHERS.The first father divided the land in this way 1 ^ 3 2 4 The second father divided the land in the followiDgmanner : … The different colors represent the several sons portions. 29. THE TRIANGLE PUZZLE. The solution of this puzzle may be easilyacquired by observing the dotted lines in theengraving ; by which it will be seen that fourtriangles are to be placed at the corners, anda small square made in the center.…
Magic tricks
Internet Archive · University of Pittsburgh Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-89-143.webp)
