The famous Australian swimmer "Boy" Charlton is seen in training.
Introductory intertitle reads: "Meet Boy Charlton, Australia's wonder swimmer - and in a hurry with his training."
L/S of Boy Charlton diving into an outdoor swimming pool. Narrator describes Charlton's stroke as he swims lengths up and down the pool. The narrator may be Australian. Film ends with a C/U of Boy Charlton. Narrator voices encouragement: "Good luck to you boy, the whole Commonwealth hopes for your return to form." and states: "The poetry of motion - that's Charlton in action."
Note: although not mentioned in this particular film, I think "Boy" Charlton's first name is in fact Andrew.