Correspondence to Hirota Ritaro Urging a Decision on the Design of the Tapestry (Object from Hirota Ritaro Residence, Book 1) デ・ラランデ書簡（タペストリーのデザインにつき）

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

Georg de Lalande

Correspondence to Hirota　Ritaro Pleading Payment of the Building Cost and Design Fees (Object from Hirota Ritaro Residence, Book 2)

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

Georg de Lalande

Correspondence to Hirota　Ritaro Regarding Bill for Rebuilding of Former Residence (Object from Hirota Ritaro Residence, Book 2)

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

Georg de Lalande

Correspondence to Hirota Ritaro Communicating Progress on the Construction by Yabe Kunitaro (Object from Hirota Ritaro Residence, Book 1)

Georg de Lalande