Ishin Shiryō Shūhō (Collection of Historic Records Related to Meiji Restoration) 維新史料聚芳

Letter (Regarding Your Question: Which Is Advantageous, Straight Spear or Cross-headed Spear?) (Reference Materials on Takahashi Deishu)

[Yamaoka Seizan]

Letter to Takahashi Deishu (I Have Duly Told Maeda Miyashige the Purport of Your Message) (Reference Materials on Takahashi Deishu)

(Okubo) Junichi

Letter to Takahashi Michitaro (Gratitude for a Visit and Invitation to Ohajiki Game) (Reference Materials on Takahashi Deishu)

(Tokugawa) Ayako, Yasuko