[1] He competed in the men's team event at the 1908 Summer Olympics.
[2] Watkins was a member of the Powell's Tillery Gymnastics Club of Abertillery, formed in 1903; most were local miners.
[4] He was a member of the Powell's Tillery team that won the Welsh Amateur Gymnastics Shield in 1906 and again in 1908, and in March 1908, aged 19, he won the Individual Gymnastic Championship of Wales at his first attempt, while studying for a colliery manager's certificate.
[5] On the strength of this performance, he was selected to captain the Welsh national gymnastics team, the youngest man ever to do so.
[5] This biographical article related to British artistic gymnastics is a stub.