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Seodangseonsaengjip(����������), introduced in this paper, is a collection of manuscripts written by Lee Deoksoo, that owns the Kyujanggak Institute for Korean Studies at Seoul National University. The name of the collection of literary works will be ��Gyujanggak script Seodangseonsaengjip�� to distinguish it from other manuscripts. This collection of works was possessed by Lee Geunjo, a descendant of Lee Deoksoo��s family.
The Gyujanggak script Seodangseonsaengjip is valuable in that it is not only well-organized, but also contains a wealth of poetry by Lee Deoksoo. It is also noteworthy that it includes Jangsiyeonhaengrok(��ԇ�����), which is difficult to find in other literary collections. Therefore, the collection of works can be said to be the best version of Lee Deoksoo. In the future, it is expected that this collection of works will be actively used in the research of Lee Deoksoo by providing the Internet original text viewing service and photo prints.