Correspondence to Hirota　Ritaro Pleading Payment of the Building Cost and Design Fees (Object from Hirota Ritaro Residence, Book 2) デ・ラランデ書簡（建築設計料支払いにつき）

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 Confirming Order of 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

Correspondence to Hirota Ritaro Accompanying Samples Curtains and Carpets (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

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

Georg de Lalande

Correspondence to Hirota　Ritaro Regarding Sending of Guest Room Wallpaper Sample and Urging a Decision (Object from Hirota Ritaro Residence, Book 2)

Georg de Lalande