![Secret Transmission of Cannon Art [6]](https://thumbs.arkivism.com/ndl-14487756.jpg)
Public domain
Secret Transmission of Cannon Art [6]
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Subjects
Credit line砲術秘伝書 [6]. National Diet Library, Japan. Public domain.
![Secret Teachings on Artillery [8]](https://thumbs.arkivism.com/ndl-14487758.jpg)
![Secret Transmission of Cannon Art [3]](https://thumbs.arkivism.com/ndl-14487753.jpg)
![Oten Calendar, Vol. 2 [1]](https://thumbs.arkivism.com/ndl-14487014.jpg)
![Secret Transmission of Cannon Art [4]](https://thumbs.arkivism.com/ndl-14487754.jpg)
