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“There is a trick invented by Pythagoras which is performed in the following manner: the moon being at the full, someone writes with blood on a looking glass anything he has a mind to; then, having given notice of it to another person, he stands behind that other and turns towards the moon the letters written in the glass. The other, looking fixedly on the shining orb, reads in it all that is written on the mirror as if it were written on the moon.” — Timothy Harley
There is a trick invented by Pythagoras which is performed in the following manner: the moon being at the full, someone writes with blood on a looking glass anything he has a mind to; then, having given notice of it to another person, he stands behind that other and turns towards the moon the letters written in the glass. The other, looking fixedly on the shining orb, reads in it all that is written on the mirror as if it were written on the moon.