Triple Australian Group One winner Sea Siren got off the mark on her first start for Aidan O'Brien when she took the feature Belgrave Stakes at Fairyhouse.
Sent off the 5-4 favourite for the Listed six-furlong contest, she travelled smoothly throughout for the trainer's son Joseph, who brought her up to challenge under two furlongs out.
Long-time leader Elusive Time gave way to Russian Soul at that point, but Sea Siren was quickly on the premises and soon asserted to score by an impressive length and a half.
The Ballydoyle team doubled up in the concluding Fairyhouse Sunday Market Handicap when the front-running Kingdom (9-10 favourite) resisted the strong challenge of Zafarqand in the final furlong to score by half a length.
David Marnane introduced a speedy youngster in Boom The Groom (10-1), who led just about all the way in the Irish Stallion Farms EBF Median Auction Maiden and might be useful.
The son of Kodiac was quickly into his stride under Pat Smullen and ran on strongly when tackled by favourite Colour Blue in the straight, winning by a length and a quarter.
John Oxx's 9-4 favourite Majestic Jasmine, a winner at Tipperary last time, followed up in the Follow Fairyhouse On Facebook Rated Race, going on over a furlong out under Declan McDonogh and scoring comfortably by a length and three-quarters.
Reggie Roberts' Heuston (2-1 joint-favourite) was second on his only start at Dundalk last year and returned to action to win the Irish Stallion Farms EBF Maiden, asserting in the final two furlongs under Ronan Whelan and holding Live Dangerously by half a length.
The Ger Lyons-trained Greek Canyon (6-1) ran away with the Fairyhouse Members Trip Handicap under Gary Carroll, while Michael Mulvany's Tohugo (16-1) flew from the clouds in extraordinary fashion to take the Children Under 18 Are Free Handicap in the hands of Tadhg O'Shea.