Ruby Walsh secured his first win since returning from injury as Glantara triumphed in the Jameson Novice Chase at Killarney.
The rider had been sidelined for over four months after breaking his arm in a fall at Aintree on Grand National day back in April.
Walsh finished third on his first ride back at Roscommon on Monday, but he did not have to wait too long for a win as Glantara made all to win by five and a half lengths.
Walsh said: "It's great to be back and the arm feels good."
"The horse jumped like a buck throughout."
Connections of Harbinger are in no rush to decide on the future of the brilliant colt, who was retired from racing last Monday.
The four-year-old was a devastating 11-length winner of the King George VI And Queen Elizabeth Stakes at Ascot on his latest appearance, but that turned out to be his last race after he fractured a leg on the gallops.
The son of Dansili is recovering well and the Highclere Thoroughbred racing team must now decide where he will head to take up a stallion career.
Highclere racing manager Harry Herbert said: "It's an ongoing process and there is an awful lot of interest in the horse.
"That is all being dissected and carefully worked out at the moment and all will be revealed eventually.
"These things take time and the horse is a sought-after item.
"He's a pretty amazing racehorse.
"When a horse is sold as a stallion it's all a question of whether the team can be involved or not.
"Those are ongoing discussion and John Warren (Highclere director) has to weigh up all the options available.
"The horse is still with the vets and is due to come out either this weekend or next week.
"They're really pleased with him and he's been a model patient.
"From that perspective, it's really good news."
Brian Meehan has nominated next month's Champagne Stakes at Doncaster as the likely next port of call for his impressive York winner Waiter's Dream.
The Oasis Dream colt turned in a hugely impressive performance in Tuesday's Group Three Acomb Stakes and Meehan is confident he can become a leading Classic contender next season.
"We were really pleased with him. He progressed from his Salisbury run, was very good at Newbury and he looked top grade," the trainer said.
"I guess the Dewhurst would be his target, but first stop would be the Champagne Stakes at Doncaster (September 11). I think he could become a Guineas horse.
"It looked yesterday that a mile is well within his scope and he's a very well-balanced, good-looking colt."