His work was first translated into English in 1771 by William Jones. It would leave a mark on such Western writers as Thoreau, Goethe, and Ralph Waldo Emerson (the last referred to him as "a poet's poet"). Sir Arthur Conan Doyle has his character Sherlock Holmes state that "there is as much sense in Hafiz as in Horace, and as much knowledge of the world" (in A Case of Identity). Friedrich Engels mentioned him in an 1853 letter to Karl Marx: