Heart of Darkness was a British-bred Thoroughbred racehorse and sire. He showed by far his best form a juvenile in 1990 when he won two of his three races including the Washington Singer Stakes and the National Stakes before his career was interrupted by a serious leg injury. He failed to win again for two years before taking two minor races in the autumn of 1992. He later stood as a breeding stallion in Australia with limited success.
Heart of Darkness began his career in a maiden race over six furlongs at Goodwood Racecourse on 4 August in which he started at odds of 9/1 and finished fourth of the eight runners, six and a quarter lengths behind the winner Majlood. Thirteen days later he was stepped up in class and distance for the Listed Washington Singer Stakes over seven furlongs at Newbury in which he was ridden, as on his debut by Steve Cauthen. Starting the 11/2 outsider of the four runners, he raced at the rear of the field before accelerating into the lead inside the final furlong and winning by one and a half lengths from the Barry Hills-trained Caerdydd. The Irish jockey Pat Shanahan took the ride when the colt was sent to Ireland to contest the Group 1 National Stakes over seven furlongs at the Curragh on 8 September. He was made the 7/4 favourite ahead of Malvernico, a Jim Bolger-trained colt who had won both the Curragh Stakes and the Anglesey Stakes. The other six runners included Caerdydd, Poets Dream, Prodigal Blues and Smooth Performance. Heart of Darkness tracked the leaders as Malvernico set the pace, but began to make progress inside the last quarter mile. He caught the Bolger colt in the final strides and won by a head, with Prodigal Blues a length away in third place. Heart of Darkness was being prepared for a run in the Dewhurst Stakes when he fractured a cannon bone in a training gallop.
1991: three-year-old season
Heart of Darkness was off the racecourse for over a year before returning for four races in the late autumn of 1991. He finished second in a minor event at Newwbury and then came home sixth in the Listed Main Reef Stakes at Newmarket Racecourse, fading in the closing stages after leading for most of the way. He went on to run second to Susurration in the Darley Stakes and ended his campaign by finishing runner-up to Mohican Girlwhen favourite for the James Seymour Stakes over ten furlongs at Newmarket on 1 November.
1992: four-year-old season
In 1992 Heart of Darkness was mainly campaigned in handicap races but had little success for most of the year and finished unplaced in his first eight races. He eventually returned to winning form at Warwick Racecourse on 5 October, taking the seven furlong Queen Bess Stakes "comfortably" by three lengths from the three-year-old Talb. Seventeen day later he followed up by winning a one mile handicap at Newbury under a weight of 140 pounds. As in his victory at Warwick he was ridden by Ray Cochrane and wore a visor. On his last two starts Heart of Darkness ran third in a handicap at Newmarket and then came home eighth of the twelve runners in the Group 3 Prix Perth at Saint-Cloud Racecourse on 8 November.
Stud record
At the end of his racing career Heart of Darkness was retired to become a breeding stallion in Australia where he sired several minor winners but no top-class performers. He reportedly died at Gundaroo on 25 May 2011 at the age of twenty-three.
