Correspondence to Hirota Ritaro Discussing Additional Construction Work (Object from Hirota Ritaro Residence, Book 1) デ・ラランデ書簡（追加工事の相談）

Letter to Okubo Hisa (Reference Materials on Takahashi Deishu)

Sano Taka

Correspondence to Hirota　Ritaro Regarding Two Enclosed Bills from Yabe Architect Office and Payment (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota Ritaro from de Lalande Requesting Payment to Yabe Architect Office (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 from de Lalande Requesting Payment of Balance (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

Correspondence to Hirota Ritaro Accompanying Samples Curtains and Carpets (Object from Hirota Ritaro Residence, Book 1)

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

Georg de Lalande