Correspondence to Hirota Ritaro Explaining the Details of Construction Charges (Object from Hirota Ritaro Residence, Book 1) デ・ラランデ書簡（工事代金の内訳説明）

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

Georg de Lalande

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 of Balance (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande

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

Georg de Lalande

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

Georg de Lalande