The first European horses scheduled to race in the Oct. 25 Breeders' Cup World Thoroughbred Championships were released from quarantine Monday morning at Santa Anita.Islington, who will be one of the favorites in the Breeders' Cup Filly & Mare Turf (gr. IT), had a light canter on the main track. She was accompanied by her travel companion, Researched, who will run Friday in the Carleton Burke (gr. IIIT).Islington, trained by Michael Stoute for the executors of the estate of the late Lord Weinstock, finished third in last year's Filly & Mare Turf after a terrible trip in which she steadied repeatedly.Oasis Dream cleared quarantine about 8 a.m. and with trainer John Gosden looking on, took about 10 laps around the paddock before returning to the barn area."He traveled well but he had a 21-hour trip. I didn't want to do much with him this morning," Gosden said.The two planes carrying European-based horses that arrived on Sunday -- one with two French fillies, the other with the Aiden O'Brien trained horses -- should clear quarantine Tuesday morning.