John Edward "Jack" London (born January 13, 1905 - died May 2, 1966) was a British athlete who competed mainly in the 100 metres. He competed for Great Britain in the 1928 Summer Olympics held in Amsterdam, Netherlands in the 100 metres where he won the silver medal. He then ran in the 4 x 100 metre relay where he won the bronze medal with his team mates Cyril Gill, Teddy Smouha and Walter Rangeley. Wikipedia
The definitive Wikipedia entry for Jack London. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Jack_London_%28athlete%29