How does jourdan anderson show he is honest?

Jordan Anderson was a former African American slave, he is famously known for his letter to his former master, the letter is acknowledged as 'Letter from a Freedman to His Old Master'. He wrote this letter to his old master when he was summoned by Colonel P. H. Anderson to work in his plantation to restore the farm which was in disorder because of the Civil War.

The letter is proof of his honesty, the names he mentions in this letter were real people. The circumstances in which he worked in that plantation is enough to show he is honest because there were thousands of slave who worked and faced a similar situation as Jordan Anderson faced.

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