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Consider also:

1. “This Tortoise is sixfold, the Holy Hexagram.”
2. “In nature the Tortoise has 6 members at angles of 60°.”
3. “Fourfold is He, the Elephant upon whom the Universe is poised: but the carapace of the Tortoise supports and covers all.”
4. Qsquare: the superposition of all permutated states of a magic square
5. The State of the Library in 2011