
Unforgotten had to pass a barrier test on Thursday after cardiac arrhythmia was detected once she finished last in the Group I ATC Surround Stakes (1400m) at Randwick on March 3.
She had a soft trial, trailing the winner by four lengths, but had plenty on reserve when it mattered most over 1500m.
On race day Unforgotten (images Steve Hart) , was all business storming home from back in the field to score a short head win over Melbourne visitor Holy Smoke in the 1500 metre contest to give Fastnet Rock the quinella.
Waller applauded Racing NSW stewards for allowing Unforgotten to trial after acceptances.
"Making her trial is good from the punters perspective. Obviously there's a lot of questions that don't get answered in racing," he said.
"There will be a bit of criticism, I'm sure, but we're doing the right thing by the horse and as a result she's won a good race.
"We rode her quiet and let her finish off, that's how she won her races in the summer, where she was starting to build that reputation."
A $360,000 NZB Premier Yearling Sale purchase from the Curraghmore Stud draft for Chris Waller Racing, Unforgotten has won four of seven starts earning over $300,000 in prizemoney for her big team of Waller stable clients.
Foaled and raised at Coolmore, Unforgotten is a sister to stakes-placed Special Memories and is the third winner from Memories of You (IRE), a half-sister to dual Group I winner Matiara from an impressive European Black Type family.
Memories of You produced a colt by brilliant Group I winner No Nay Never (USA) last spring and was then covered by Champion 2YO Air Force Blue (USA).
Unforgotten is the 132nd stakes-winner worldwide for Fastnet Rock and is the 16th stakes-winner for Fastnet Rock bred from a daughter of Galileo.
Also trained by Chris Waller is talented gelding Comin' Through, who charged through a gap to snatch a narrow win in the Group II ATC Ajax Stakes over 1500 metres at his second run back from a spell.

"He's down right at the weights, he was placed in the Randwick Guineas as a three-year-old, he's never been far away in some of the best races in town," he said.
"I'd be pretty bullish about his chances."
Comin' Through wasgelded before this preparation, a decision that now looks as though it was a good one.
"It was a hard decision, especially for (owner) Sir Owen Glenn because he's a passionate breeder," Waller said.

Peter and Paul Snowden train the two year-old full brother to Comin' Through called Sir Owen and his dam Mica's Pride produced a filly by Sebring last spring that is a full sister to $7million earner Criterion.
Fastnet Rock has 39 entries for the 2018 Inglis Australian Easter Yearling Sale next month.