For example, Euler could repeat the Aeneid of Virgil from beginning to end without hesitation, and for every page in the edition he could indicate which line was the first and which the last.
Por exemplo, Euler podía repetir a Eneida de Virxilio dende o comezo ata o final sen dubidar, e para cada páxina da edición podía indicar que liña era a primeira e cal a derradeira.