 In 1806 he published "Translations and Imitations of Poets, Old and New", in the preface of which he denounced the classic Swedish writers with much force and wit, commending Goethe and Tieck to the young poets of the day.In 1803 appeared his "Critique of Schiller", and in 1810 a volume of essays of a polemical kind.In 1813 Hammarsköld published a collection of his poems, and in 1815 had to endure the ridicule of Tegnér's satire "Hammarspik".