Correspondence to Hirota Ritaro Communicating Progress on the Construction by Yabe Kunitaro (Object from Hirota Ritaro Residence, Book 1) デ・ラランデ書簡（矢部國太郎による工事の進捗）

Correspondence to Hirota　Ritaro Regarding Sending of Wallpaper Sample (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota Ritaro Accompanying a Bill for Stained Glass (Object from Hirota Ritaro Residence, Book 1)

Georg de Lalande

Correspondence to Hirota Ritaro Explaining the Details of Construction Charges (Object from Hirota Ritaro Residence, Book 1)

Georg de Lalande

Correspondence to Hirota Ritaro Confirming Order of a Relief (Object from Hirota Ritaro Residence, Book 1)

Georg de Lalande

Correspondence to Hirota Ritaro from de Lalande Regarding Return of Loaned Money (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota　Ritaro Regarding Enclosure of the Receipt for a Purchase of a Picture and a Request to Offer Work (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota Ritaro Communicating Assurance of Completion of the Hirota Residence and Enclosure of a Receipt (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota Ritaro Discussing Additional Construction Work (Object from Hirota Ritaro Residence, Book 1)

Georg de Lalande