Stevens, Page 61

• The symmetry group of the tiling is 442 (p4).
• All the internal angles of the constituent polygons are a multiple of 15°.
• There are two non-regular reflective tiles and one reflective pair and one tile with no mirror image.
• The tiling does not satisfy the two-colour condition.
• The tiling is not edge-to-edge.
• As drawn, contains about 132 polygons.

1. Page 61, Figure 8.2h (Chinese, about 1900, single square in original) of Peter S Stevens. Handbook of regular patterns: an introduction to symmetry in two..., MIT Press, 1984. ISBN 026269088. [stevens] {Illustrations in black and white}

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