[1] She inherited her grey colour from her sire Tetratema, the leading British two-year-old of 1919 who went on to win the 2000 Guineas and many important sprint races.
[2] Myrobella's dam, Dolabella, produced six other winners and was a daughter of the outstanding broodmare Gondolette, whose other descendants included Hyperion, Sickle, Sansovino, Entrepreneur, Might and Power and Sariska.
In July she contested the most valuable two-year-old race of the year, the £6953 National Breeders' Produce Stakes over five furlongs at Sandown Park Racecourse.
[8] Contemporary commentators rated Myrobella the equal of the "flying filly" Mumtaz Mahal and superior to the undefeated Tiffin.
She then won the July Cup at Newmarket and the King George Stakes at Goodwood Racecourse, beating the five-year-old Concerto on both occasions.
At York Racecourse in August, she was beaten a short head by Concerto in the Nunthorpe Stakes, with Gold Bridge a neck away in third place.
Foaled in 1939, Big Game was the best British colt of his generation, winning the 2000 Guineas and the Champion Stakes before becoming a successful breeding stallion.