Apart from a few notable Tuesdays in November, this was one of the days owner Lloyd Williams lives for.

Four winners in two states, all in black type races and all with more to give when the biggest races roll around.

The crowning moment for the prolific owner came in the Group One Turnbull Stakes (2000m) where he claimed the quinella with Green Moon and Seville.

Earlier on the same program Tanby carried his blue and white colours to victory in the Listed Bart Cummings (2500m) and at Randwick his top Melbourne Cup hope Mourayan won the Group Three Craven Plate (2000m).

Fawkner then capped off the day with victory in the Listed Headquarters Tavern Stakes (1410m).

"I think we can move on to Cox Plates and Caulfield Cups and go in with live chances," said Williams's son and stable spokesman Nick Williams.

Williams has been involved in the ownership of three Melbourne Cup winners, Just A Dash in 1981, What A Nuisance (1985) and Efficient (2007) who was retired in the past week.

This year the owner who has spent millions searching for another winner of Australia's greatest race has come up with an internationally assembled stable that has a strong hand in Melbourne's three biggest spring races.

Green Moon is shaping as his top Melbourne Cup prospect and is also in contention in the Cox Plate, Seville has run himself into Caulfield Cup calculations and Mourayan is a Caulfield Cup Prospect.

Tanby will be aimed at the Moonee Valley Cup and Fawkner is likely to go to the Group One Toorak Handicap.

Green Moon ($4 fav) survived a wide run and the late charge of his stablemate to score by a long neck.

December Draw ran on reasonably for third 1-1/4 lengths away.

In a wishful reference to star Sydney colt and Cox Plate favourite Pierro, Nick Williams suggested he should stay at home.

"If I had a tree-year-old I wouldn't even bother bringing it down here ... they should find a race in Sydney for it," he said.

"Look how tough Green Moon was, three wide the trip without cover."

While Green Moon confirmed himself as a Caulfield Cup prospect, last year's winner Southern Speed now seems out of contention after a "horribly disappointing" second last of 16.

"It was the worst run of her life," said trainer Leon Macdonald.

"She didn't want to leave the gates, she never let down."

Jockey Glen Boss said he feared the mare had injured herself, but a veterinary examination failed to reveal any abnormality.