〔飯田貞一書簡〕

〔飯田貞一葉書〕

Saga Prefectual Library

Saga Prefectural Library Database

〔貞一書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔飯田貞一年賀状〕

Saga Prefectual Library

Saga Prefectural Library Database

飯田圭介書簡

Saga Prefectual Library

Saga Prefectural Library Database

野田常貞書簡

Saga Prefectual Library

Saga Prefectural Library Database

〔飯盛太一書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

飯盛太一書簡

Saga Prefectual Library

Saga Prefectural Library Database

荒木貞一書簡

Saga Prefectual Library

Saga Prefectural Library Database

〔飯島書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔貞吉書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

[矢野一貞　舟曳 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

〔石丸貞一殿書簡封筒〕

Saga Prefectual Library

Saga Prefectural Library Database

〔堤貞陽書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

[千田貞暁　長谷川 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

〔江口東平・太田貞七書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

飯田蔵書

National Institute of Japanese Literature

Collectors'Seals Database

〔石丸勝一・福地貞夫書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔内田清一書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔寺田信一書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

池田太一書簡

Saga Prefectual Library

Saga Prefectural Library Database

〔石田官一書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

[飯田守年　鈴木重之 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

[飯田恭雄　鈴木範衛 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

[飯田年平　福羽〔美静〕 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections