Robinson's Barley

'Here's Health!' Says Old Hethers. See the shelf under the umpire's seat? There is usually a bottle of Robinson's Barley Water there; for this cool, smooth drink is much favoured at Wimbledon, both during the rigours of training and in the hotly contested matches. There's no pleasanter way of quenching a sporting thirst.
Source: Illustrated. July 4, 1953.