The letter claims to be from the man who made the bag, who claimed to be unfairly held in a prison factory.
On the top, it is marked: "HELP! HELP! HELP!"
The Huffington Post report that it was discovered by Stephanie Wilson in September 2012, while the letter itself was dated three months earlier.
The letter—and attached picture—suggested an African man may have written it. After a lengthy search, DNAInfo tracked down the man, now free from prison, a Cameroonian by the name of Tohnain Emmanuel Njong.
Eto'o, also from the Cameroon, is a hero in his home continent. At the time he was playing club football with Anzhi Makhachkala in Russia.
In addition to reporting the inhumane conditions, Njong's letter asked:
Please help to contact the United Nations Human Rights Department or if possible Samuel Eto'o and let them know my sad story. I'm Eto'o's fan club manager in the University.
Thanks and sorry to bother you.
According to the report Njong was teaching in China when he was sentenced to three years in jail for fraud—a crime he denies.
While he was in prison, he worked from 6 a.m. until 10 p.m. making paper bags or other small items.
He was released in December 2013 and put on a plane back to Cameroon.
That he sought Eto'o's help is in some way no surprise—as well as being a football star, he's also known as a philanthropist because of the work of his foundation in the country.
Eto'o will not have been aware of his story, but Njong is quoted as saying he is glad someone did discover his letter.
"It was the biggest surprise of my life," said Njong. “I am just happy that someone heard my cry."