What unique accomplishment did ruben darío achieve at the age of 18

Rubén Darío was a Nicaraguan poet who was born in January 18, 1867. According to his own testimony, he learned to read when he was three years old. As soon as he learned to read, he started writing his first verses. The elegy, Una lágrima was published in the daily El Termómetro (Rivas) on July 26, 1880. So he won an award for this poem.

in the dark you call me from the darkness you called me i recognized your voice you recognized my neighbor for here i said you where you are dad i do not see you here i am here and i am afraid you said not my son wait i have you where are you this dark i do not see anything i have fear do not be afraid, son, right now, i'm coming soon, papa, i'm waiting for you, a father cries out to his son