sentences:  Sir Ivor returned in late September when he ran in the Prix Henry Delamarre at Longchamp in which he finished half a length second to Prince Sao, to whom he was conceding nine pounds.One week later, he returned to Longchamp for the Prix de l'Arc de Triomphe.Sir Ivor, whose best distance was probably 10 furlongs was outstayed by the favourite, Vaguely Noble, who won by three lengths.