The 18th century literary writer Shim Ik-woon’s “Yeolseongeochaleonseobal” (列聖御札諺書跋) is an epilogue included in his collection of literary works, Baegiljib (百一集). Although not known until now, “Yeolseongeochaleonseobal” is an epilogue of Sookmyungshinhancheop (淑明宸翰帖). Sookmyungshinhancheop is a letter book that consists of a collection of Korean letters received from kings and queens by Princess Sookmyung (淑明公主), the third daughter of Hyojong (孝宗). In this paper, by analyzing the full text of “Yeolseongeochaleonseobal”, the key bibliographical information regarding Sookmyungshinhancheop was newly revealed. In addition, Shim Ik-woon’s critique of Queen Inseon’s Korean letters in the “Yeolseongeochaleonseobal” was examined, and it was considered to be a form of ‘letter critique’.