This morning I posted “Tangrams” which was look at tangrams, a Chinese puzzle. I thought that my first introduction to tangrams, was through the book Chasing Vermeer, but one of my most avid readers reminded me (at 6:30 AM) that the book was not about tangrams, but about pentominoes. I really did think my memory was right on that one, but alas, the signs of aging are popping out all over the place. I will rewrite the post about tangrams, and I will also write one about Chasing Vermeer and pentominoes. Sorry for the confusion.