[1] Williamson, who played his football mostly on the ball or in defence, started his career at West Torrens.
[2] His stint as captain included their 1933 premiership win, when they defeated Norwood by 23 points in the grand final.
[3] He played at Hawthorn in the 1934 VFL season, a much weaker side which would win only one of the 12 games that he appeared in.
[2] Back in South Australia, Williamson played with West Torrens for three further seasons.
In November 1936 he married Dulcie Elizabeth Lill and they lived in Jetty Street, Grange, South Australia.