PERSON@1 's one-sided infatuation with his cousins MISC@1 and PERSON@2 later inspired him to write some of his loveliest lyrics ; PERSON@3 der Lieder -LRB- MISC@2 , NUMBER@1 -RRB- was PERSON@1 's first comprehensive collection of verse .

PERSON@1 's one-sided infatuation with his cousins MISC@1 and PERSON@2 later inspired him to write some of his loveliest lyrics ; PERSON@3 der Lieder -LRB- `` Book of Songs '' , NUMBER@1 -RRB- was PERSON@1 's first comprehensive collection of verse .
