HINTS：?

"Far ... south", he read, "at ... Syene, something ... year."

crept?

slither?

"Far to the south", he read, "at the frontier outpost of Syene, something notable could be seen on the longest day of the year." On June 21st, the shadows of a temple column or a vertical stick would grow shorter as noon approached. And as the hours crept towards midday, the sun's rays would slither down the sides of a deep well, which on other days would remain in shadow. And then precisely at noon, columns would cast no shadows and the sun would shine directly down into the water of the well. At that moment, the sun was exactly overhead.

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