SV pan, start of 350 c.c. race. SV towards and pan, No 18 T. K. Kavanagh on Guzzi leading field in early stages. LV towards and pan, rider rounding bend. SV crowd. SV towards, Fergus Anderson crossing line to win the 350 c.c. event. SV crowd applauding. SV Anderson receiving bouquet. STV crowd. SV CU Geoff Duke standing by his Gilera No 6. CU instrument panel on Duke's bike. SV towards and pan, start of 500 c.c. event - Duke away to a good start. SV towards and pan, Duke rounding bend ahead of field. SV towards and pan, rest of field following. GV towards and pan, rounding bend. SV No 60 Montanari, running off the road and stopping in a field. SV pan, Duke way out in front. SV towards, Duke crossing finishing line. SV crowd. SV Duke walking towards after race. SV Duke mounting rostrum carrying bouquet.