Apart from 'The Stadium, Southampton' book by CR Bailey, there is another book which is called 'A Dangerous Life', the speedway life story of Chum Taylor, published in Australia in 1986. I managed to pick up a copy a few years ago at Poole, only because there is a picture on the front cover of Chum in an Oxford race jacket! But, by its very nature, there is much on his years at Southampton and some pictures as well.
Ah, memories! My Uncle used to go on about Dick Bradley at Bristol (and Johnnie Hole) and I remember seeing Southampton several times at Oxford. Sadly I never got to either track, they both closed before I was old enough to start getting out and about.
I did see DC's team in a second half at Poole one time which brought back some memories. What a boon it would be if a track opened in Southampton again!
Regards