Fyldener was a bay horse "of great size and power" with black legs and no white markings, bred by John Clifton.
[2] His Dam, Fanny, was an important broodmare, having previously produced the Doncaster Cup winner and Derby runner-up Sir Oliver, and a successful racehorse named Poulton.
Fanny's other direct descendants included Chapeau d'Espagne and Rattlewings, the Foundation mare of Thoroughbred family 13-e.[3] Fyldener is a name given to an inhabitant of the Fylde peninsula in Lancashire.
On 2 June, the opening day of the meeting, he won a match race over one and a half miles, beating Baronet, who bolted after taking an early lead.
He started at odds of 4/1 and after a "very fine race"[5] won by a head from Sir William Gerard's colt Julius Caesar with Baronet in third.
[8] On 23 September, Fyldener was one of fifteen colts and fillies to contest the thirty-first running of the St Leger Stakes at Doncaster Racecourse.
[9] Ridden by Tom Carr, Fyldener started the 7/4 favourite ahead of his stable companion Warrior (3/1), Sir John Shelley's Clasher and Mr Mellish's Luck's All (12/1).
After a "remarkable fine race"[10] Fyldener won the classic by a length from Lord Strathmore's unnamed brother to Witchcraft, with Richard Watt's colt Shuttlecock in third.