July 6 - In what was billed as the "Battle of the sexes," Kentucky Derby winner, Foolish Pleasure[?] went head to head in a match race against the undefeated filly, Ruffian[?]. In the lead, Ruffian broke a leg and after an unsuccessful operation to save her, the horse most believe to be the greatest thoroughbred filly ever, was humanely put down.
July 7 - Ruffian[?], undefeated filly race horse who broke a leg during a match race the previous day and had to put down after an usuccessful operation.
... success in early Grand Prix racing, winning the first ever Monaco Grand Prix and with driver Jean-Pierre Wimille[?] they won the 1937 and 1939 24 hours of L ...