<Tr> <Td> </Td> <Td> Pack Up Your Troubles in Your Old Kit - Bag, and Smile, Smile, Smile (As sung by Helen Clark (1917) </Td> </Tr> <Tr> <Td_colspan="2"> Problems playing this file? See media help . </Td> </Tr> <P> "Pack Up Your Troubles in Your Old Kit - Bag, and Smile, Smile, Smile" is the full name of a World War I marching song, published in 1915 in London . It was written by Welsh songwriter George Henry Powell under the pseudonym of "George Asaf", and set to music by his brother Felix Powell . </P> <P> It was featured in the American show Her Soldier Boy, which opened in December 1916 . </P>

Who wrote pack up your troubles in your old kit bag