<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> The Life That I Have (sometimes referred to as Yours) is a short poem written by Leo Marks and used as a poem code in the Second World War . </P> <P> In the war, famous poems were used to encrypt messages . This was, however, found to be insecure because enemy cryptanalysts were able to locate the original from published sources . Marks countered this by using his own written creations . The Life That I Have was an original poem composed on Christmas Eve 1943 and was originally written by Marks in memory of his girlfriend Ruth, who had just died in a plane crash in Canada . On 24 March 1944, the poem was issued by Marks to Violette Szabo, a French agent of Special Operations Executive who was eventually captured, tortured and killed by the Nazis . </P>

Who wrote the poem the life that i have is all that i have