https://www.digital.archives.go.jp/item/en/2498104

[Items] "海軍省稟請米国留学生井上良智病気諸費官費支弁ヲ許サス年賦期限ヲ定メ更ニ稟候セシム", 類00042100-00800, National Archives of Japan Digital Archive, https://www.digital.archives.go.jp/item/en/2498104(accessed 2026-10-09)