Noble Mission gave Jane Cecil a poignant first Group One success as he continued his own incredible transformation in the Tattersalls Gold Cup at the Curragh.
It is almost a year ago that she took over the running of Warren Place in Newmarket after the death of her celebrated husband Henry, who finished his career by training the equine giant Frankel.
Noble Mission is a full-brother to Frankel and it is only at the age of five that he has started to emerge from his sibling's shadow, reaping the benefit of an aggressive ride from James Doyle, also successful in the colours of Khalid Abdullah on Kingman in Saturday's Tattersalls Irish 2000 Guineas.
Noble Mission and Magician went off the even-money joint-favourites and the Aidan O'Brien-trained runner-up closed to a length and a quarter by the post.
The winner had started to earn a slightly dubious reputation in his first three seasons and he was beaten by Cubanita on his reappearance at Newbury.
Front-running tactics worked a treat when he hammered Telescope in the Gordon Richards Stakes at Sandown, and he got the better of the same rival in the Huxley at Chester.
Doyle established a considerable lead turning for home, where Joseph O'Brien started to cajole Magician, and although Noble Mission seemed to be running on fumes inside the final furlong, his initial advantage proved decisive.
As was tradition at Warren Place under Henry Cecil's regime, a flag with the family’s coat of arms will now be raised at the yard to celebrate a Group One triumph for the team.
Lady Cecil said: "It's great for all the staff at Warren Place.
"Our big aim was to win a Group One race and to raise the flag for Henry.
"I'm very emotional now. I've almost 30 horses for Prince Khalid and without the horses you just can't do it.
"I'll have to talk to Teddy (Grimthorpe, owner's racing manager) but, to be honest, we didn't think past this about where he might next go.
"He's in the Eclipse at Sandown but we'll have to see how he comes out of this first."
Grimthorpe said: "It's a huge win.
"To win a Group One with Frankel's brother, it's great tribute to those at Warren Place and huge for Juddmonte. It really is a very special day.
"We fell upon the (front-running) plan at Sandown because of needs but it worked again at Chester so we thought must try it again here.
"We need to sit down and have some good thoughts now. He's had four quite tough races, we might need to give him a little bit of a breather but that's up to Jane."
O'Brien said of Magician: "The race was in trouble of losing its Group One status.
"The ground was far from ideal but we had to run as it would be very detrimental to Irish racing to lose a Group One race.
"Joseph looked after him."
Adelaide followed on from St Leger hero Leading Light last year to give O'Brien a ninth victory in the previous 11 renewals of the Group Three Airlie Stud Gallinule Stakes.
The 4-6 favourite, who was second on his comeback in the Prix Hocquart, followed fairly close behind stablemate Mekong River and started to get down to business in the last couple of the 10 furlongs.
Boqa threw down his own challenge, but the Investec Derby and King Edward VII Stakes finished three lengths in front of Mekong River.
O'Brien said: "We were worried about the soft ground for him as he's a lovely-moving horse.
"He's done everything what we've asked of him so far, and he could go to Ascot for the King Edward, or there's a chance he could go for the French Derby next weekend, but that could come too soon.
"The problem with the French Derby, if you're drawn one it is very difficult over a mile and a quarter at Chantilly."
Intense Style (20-1) comprehensively reversed placings with O'Brien's 2-7 favourite Dick Whittington in the Elusive Pimpernel EBF Maiden.
Jim Bolger's youngster was well behind Dick Whittington when the pair finished behind Saturday's Marble Hill winner at Naas, but was a length and a quarter to the good here.
Bolger said: "He ran very well in his first race but he then misbehaved at Naas and lost the plot.
"I think I'll move him up to stakes class now."
Lightly-raced Great Minds (4-1 favourite) defied stall one to make it back-to-back wins at the Kildare track in the Emirates Equestrian Federation Handicap.
Fozzy Stack, son of winning trainer Tommy, said: "He's improving and we'll look at all those big handicaps, the Scurry, Rockingham, Wokingham, Ayr Gold Cup, races like that."
Aidan O'Brien completed a three-timer following his Irish Guineas triumph with Wonderfully when 5-4 favourite Table Mountain obliged in the concluding Newstalk EBF Maiden.
Tony Martin has a useful dual-purpose customer in Thomas Edison, who took the Irish Daily Mail Handicap as a well-backed 4-1 favourite for owner JP McManus.
"Winter ground catches him out, but with his age and the bit of National Hunt on his side it probably got him through compared to the Flat ones," said Martin.
"He's a horse that's had his problems and has been a bit unlucky a few times over hurdles so we might stay on the Flat for the moment but our options are open with hurdles and fences."