Walthamstow sundial outside underground station (very accurate with nearby correcting graph) https://t.co/7DDvNXhJ5J
— Maurizio Morabito (@omnologos) September 19, 2020
from Twitter https://twitter.com/omnologos
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Walthamstow sundial outside underground station (very accurate with nearby correcting graph) https://t.co/7DDvNXhJ5J
— Maurizio Morabito (@omnologos) September 19, 2020
from Twitter https://twitter.com/omnologos