Joseph O'Brien was in excellent form as he rode a 259-1 four-timer at Dundalk on Wednesday evening.

The champion jockey began the meeting with a fine positive ride on Antiques (5-2fav) in the Christmas Party Packages At Dundalk Stadium Handicap.

Joanna Morgan's filly was soon in front and never really looked like getting caught as she held Majestic Timeline by a length and a quarter to justify favouritism for the second time in less than a week.

O'Brien had to work harder to score on Deep Speed in the Dundalk Stadium - Light Up Your Night Maiden.

The 2-1 co-favourite tracked leader Lean And Kean into the home straight before the pair knuckled down for a thrilling battle, with Paul Hickey's representative eventually getting half a length in front close home.

O'Brien did well to get Mountain Coral (9-2) up in the Crowne Plaza Hotel Race & Stay Package Handicap.

The 2009 Scurry Handicap winner ended a two-year drought as he hit the front well inside the final furlong and was all out to hold fast-finishing favourite Miller Beach by half a length.

The young jockey's best ride of the night came on Habesh (7-2), who looked in trouble turning for home in the Crowne Plaza Leading Jockey & Trainer Championship Handicap.

Once in the straight, Eugene O'Sullivan's gelding really began to motor and made up plenty of late ground to deny Vim by half a length.

The feature race went to Quadrivium as the 15-2 shot made a winning debut in the Irish Stallion Farms European Breeders Fund (C & G) Maiden.

Closely related to some smart sorts from North America, the Henrythenavigator colt quickly went about repaying some of the $120,000 he cost connections at the Keeneland Sales with a determined victory.

David Wachman's representative had pacesetter Vector Force in his sights rounding the home turn and showed an attitude to match his ability to wear that rival down with threequarters of a length to spare.