original_query: What was the duration of J.A. Joyce's endurance record at Montlhéry?
query: What was the duration of J.A. Joyce's endurance record at Montlhéry?
answer: The provided text mentions J.A. Joyce winning the Brighton Speed Trials in 1923 and 1924, and assisting Victor Bruce and his wife in setting a 10-day endurance record at Montlhéry in 1927, but it doesn't specify a separate endurance record for J.A. Joyce at Montlhéry.