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*French ship ''[[Alcmene]]'' calls at Ryukyu; drops off the Catholic missionary [[Theodore Augustin Forcade]] and leaves.
*French ship ''[[Alcmene]]'' calls at Ryukyu; drops off the Catholic missionary [[Theodore Augustin Forcade]] and leaves.
*The French secure from the [[Daoguang Emperor]] an edict of toleration for Christianity (severe proscriptions had been issued in [[1724]]) in China.
*The French secure from the [[Daoguang Emperor]] an edict of toleration for Christianity (severe proscriptions had been issued in [[1724]]) in China.
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*The ''Haiguo tuzhi'' by Wei Yuan<!--魏源, 1794-1857--> is published in China. This is the first Chinese work to provide a realistic assessment of the extent of European expansion, and its impact on Asian trade and politics.
*The shogunate asks publishers [[Subaraya Mohei]]<!--須原屋茂兵衛--> and [[Izumoji Bunjiro|Izumoji Bunjirô]]<!--出雲寺文治郎--> to reveal their sources for ''[[bukan]]'' (guidebooks to samurai houses); this is an indication that the source was not the shogunate itself.
*The shogunate asks publishers [[Subaraya Mohei]]<!--須原屋茂兵衛--> and [[Izumoji Bunjiro|Izumoji Bunjirô]]<!--出雲寺文治郎--> to reveal their sources for ''[[bukan]]'' (guidebooks to samurai houses); this is an indication that the source was not the shogunate itself.
*The Lord of [[Tsushima han]] forwards to the Korean court a request from the shogunate, that a [[Korean embassy]] journey to Osaka in [[1846]].
*The Lord of [[Tsushima han]] forwards to the Korean court a request from the shogunate, that a [[Korean embassy]] journey to Osaka in [[1846]].