CHAMPION jockey Basil Marcus was at his irrepressible best in landing a treble at Sha Tin yesterday as a frustrated Tony Cruz watched from the stands. The South African moved five clear of Cruz, out of action with an injured neck, in the championship battle thanks to a double for retaining trainer David Hill and a win for solid supporter Ivan Allan on Captive Trick (8-1) in the fourth event. Hill flexed his muscles with this twosome, the first a significant success with stable debutant William's Leader (5-2 favourite) in race two and the second a facile victory with topweight Beyond Control (5-2 favourite) in the seventh event. But leading trainer Allan, currently in New Zealand on a buying mission, kept his position with a double, the win with Captive Trick and an opening race breeze-up with odds-on Jharna (8-5), giving Gerald Mosse a welcome back winner with his first ride. Marcus said: ''It has been a great day. I was very hopeful going into the meeting but a treble is a bit special. ''David (Hill) had William's Leader absolutely ready for his debut for us and I had been very pleased with his trial on the previous Tuesday. I knew he was fit enough to run a top race and he really did it well. ''He was able to make the pace quite easily and I knew there was plenty in reserve,'' Marcus said. His only worry about Beyond Control in a dire Class Six event was the fact that the horse was starting for the first time this season. ''It was a poor field but they had all had runs and it is a little bit of a concern. But he was always going really well,'' Marcus said. The Marcus win on Captive Trick deprived Mosse of a double and thwarted a huge plunge on the Frenchman's mount, Blaze Of Glory (5-2 favourite) in the Class Five, 1,000-metre dash. Trained by Neville Begg and a high-priced yearling, Blaze Of Glory was a chance ride for Mosse following the fall of Walter Swinburn at Happy Valley on Wednesday night. The beautifully-bred youngster ran greenly and Mosse went for an inside run late on which Marcus quickly closed. It led to a fruitless objection and the Arc-winning jockey, on reflection, might well have thought about going to the outside rather than the inside. Mosse also caused claimer Victor C.F. Chan to snatch up on Action Time and was fortunate to escape with an official rap over the knuckles. But Blaze Of Glory will obviously go on from this although those taking yesterday's short odds won't be getting a much longer quote in the future. William's Leader pleased joint champion trainer Hill, who said: ''I've had the horse for about three months and we were aiming him for this first-up crack. ''I don't take over that many horses from other trainers but you like to be right when you do and I thought I could definitely get a win or two out of this fellow.'' The 1,600-metre Class Two event might have been considered slightly on the short side for the six-year-old old son of Irish Derby winner Law Society. But Hill's sharper work paid off and he followed right on from an impressive trial to win by a fast-diminishing head from bottomweight Full Speed Ahead (8-1), ridden by compatriot Felix Coetzee. Full Speed Ahead can certainly go on and win one from here but there were ominous signs about the run of former quality performer, E Treasure (3-1). The eight-year-old was never going well for Alan Munro and finished last in the field of nine. The Kan-trained Lucky Money (10-1) finished a game third, a length behind Full Speed Ahead, having been given every chance by Jimmy K.H. Ting. He ranged up half way down the straight to threaten William's Leader but Marcus and the eventual winner pulledout the stops and Lucky Money fell away.