This article examines the compilation and its implication the Library of Congress’ Collection of Sanhak Seonsaeng An(筭學先生案). Among the three types of Juhak Seonsaeng An(籌學先生案), the collection of the U.S. Congress was compiled the latest, the year of 1873, and recorded the the largest number of people of 1231. As the period of compilation and the contents are different, through comparison with each other, the compilation and its implication can be revealed.
The most prominent aspect is that it is accompanied by Juhak Seonsaeng An Jungsugi(籌學先生案重修記). It was translated and introduced into Korean, and it was considered to have been reconstructed by Jeon Joon Min(全俊敏), the head of the main school, in the year of Gyeongjin(1640). It was also pointed out that there were 32 testimonies supplementing the contents. Overall, the contents are also the richest teacher’s draft, and at the same time, it is almost the last one to be reconstructed.
The Juhak Seonsaeng An was written by people engaged in the actual Juhak work. Sanhak Seonsaeng An compiled by Jeon Jun-min is considered to have been reconstructed several times, and the U.S. Congress Collection was one of the reconstructions, and the last one. Compiling the The Juhak Seonsaeng An was an issue that was directly related to their identity of Sanwon(算員) in the late Joseon Dynasty. In other words, it was also a pride in their job and a meaning of their existence.