The Rhind papyrus
Ahmes, an Egyptian scribe in -1650 or about, is the famous author of the Rhind papyrus 
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This papyrus is currently kept at the British Museum of London.
It used to measure 5m in length and 32cm of width, originally.
It has the name of the Scot Henry Rhind who bought it in 1858 in Louxor.
We can read the writing of fractions' doubles using only different fractions with 1 as numerator.