An astonishing discovery was made in 1995 during the British Library's removal from the British Museum. Thirty-four letters and eighteen draft poems, including ‘Break of Day in the Trenches’, ‘Dead Man's Dump’ and ‘Returning, We Hear the Larks’ by the major First World War poet Isaac Rosenberg, were found in a bundle of papers stored by former museum keeper Laurence Binyon, himself a poet and Rosenberg's mentor. The newly discovered papers include all Rosenberg's complete letters and draft poems to Binyon and the poet Gordon Bottomley, together with material about Rosenberg from family, friends and mentors such as his sister Annie, Whitechapel librarian Morley Dainow, schoolteacher Winifreda Seaton, and patron Frank Emanuel. All are published here, most for the first time.