Eratosthenes, surnamed the Philologist, a philosopher of Alexandria, born at Cyrene, 276 B.C.; becoming blind and tired of life, he starved himself to death at the age of 80; he ranks high among ancient astronomers; measured the obliquity of the ecliptic, and estimated the size of the earth (276‒194 B.C.).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Erato * Ercilla y Zuñiga