Mathiu's letter (マッシュの手紙 Massyu no Tegami) is a key item in Suikoden.
Mathiu's letter was a letter written by Mathiu Silverberg intended for delivery to Kimberly in Antei. The letter provided details about Mathiu's plans to rescue Liukan, namely the plan to counterfeit the fake orders. Kimberly couldn't actually read the letter however, leaving it to Gremio to read it to her.
- A second letter from Mathiu is later given to the player to deliver to Leon Silverberg but it does not appear in the inventory.
- Genso Suikoden Kiwami Encyclopedia, page 99