Curse of Scotland excluded, making the 7, later called the "beer card", a "stop") but there is no direct relation with the 9. Gomme's book goes on to claim "At the game of Pope Joan, the nine of diamonds is Pope; therefore the nine of diamonds is the curse of Scotland". "The Spectator" review considered the claim "more cogent in form than in matter". A letter written in response to "The Spectator's" book review pointed out that the saying was established well before Culloden, and preferred the Pope Joan theory to other explanations. Other explanations given in the letter were: An 1864 book
Ten of diamonds decahedron be stacked together in 3 axes to fill space. The 12 vertex coordinates in a 2-unit cube. (further augmentations on the rhombi can be done with 2 unit translation in "z".) Ten of diamonds decahedron In geometry, the ten-of-diamonds decahedron is a space-filling polyhedron with 10 faces, 2 opposite rhombi with orthogonal major axes, connected by 8 identical isosceles triangle faces. Michael Goldberg references it by the playing card name, "ten-of-diamonds", as a 10-faced polyhedron with two opposite rhombic (diamond-shaped) faces. He catalogued it in a 1982 paper as 10-II, the second in a list of 26 known space-filling decahedra.