Cover of "Sky and Wind and Star and Poem"(1941), Yoon Dongju’s handwritten poetry book for charity that he personally created on the occasion of his graduation from Yonhui College. You can see that faint traces remain from the poet writing and erasing the word ‘Hospital’ as the title of his poetry book. You can also see the phrase that the poetry book is dedicated to his junior in school, Jeong Byeonguk. If this poetry book had not been preserved, we would not have known poems like Prelude.