Percy and his pals frequently wore another kind of headgear — the slouch hat. It featured an indented crown, a pleated band of contrasting material, a chin strap, and a wide brim that could be turned up on one side, like the famous Australian slouch hat.
These hats only appear in the photos of Percy’s training during the summer. Different individuals wore them at different angles. The fellowon the left in the foreground looks like Percy.