〔慧南久書簡〕

〔南佐久二書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔久子書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔久保書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔久納書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔久納書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔久衛書簡〕

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多久書簡

Saga Prefectual Library

Saga Prefectural Library Database

宮■則久書簡

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〔大久保書簡〕

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岡久造書簡

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〔多久島書簡〕

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Saga Prefectural Library Database

〔増田久書簡〕

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Saga Prefectural Library Database

浦久平書簡

Saga Prefectual Library

Saga Prefectural Library Database

〔増田久書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔増田久書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

〔宗□則久書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

[長久保赤水（長玄珠）　南浦 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

[久我通久　紫水 宛書簡]

Tokyo Metropolitan Central Library

Tokyo Metropolitan Library Edo-Tokyo Digital Collections

土方久元書簡

Kochi Prefectural Library

OTEPIA Kochi Library collection search

〔久保源吉書簡〕

Saga Prefectual Library

Saga Prefectural Library Database

佐藤都久書簡

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土方久元書簡

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Saga Prefectural Library Database

土方久元書簡

Saga Prefectual Library

Saga Prefectural Library Database

東久世通■書簡

Saga Prefectual Library

Saga Prefectural Library Database