What does the letter from the peddler explain?

The letter from the peddler explains his gratitude toward Edla for her kindness and hospitality, which inspired him to reform himself. He acknowledges that her trust helped him view life differently, and he expresses his wish to repay her by leaving the stolen money for her to return. Through this letter, the peddler confesses his past misdeeds but also highlights the powerful effect of Edla’s compassion, showing his sincere transformation and desire to lead an honest life.