During his career Machell won 11 English Classic races for his clients plus other major races including four
Ascot Gold Cups and five
Stewards' Cups at Goodwood as well as the four
Grand Nationals at Aintree and the
Scottish Grand National. His patrons included
Lord Henry Chaplin,
Sir George Chetwynd, the Duke of Devonshire,
Lord Calthorpe, Sir Charles Legard, the third and fourth Earls of Lonsdale, Colonel
Owen Williams, Captain Prime, Lord Hastings, Lord Gerard, the Duke of Beaufort, Lord Strathnairn, Lord Aylesford, Mr C. J. Blake, Lord Rodney and
Colonel Harry McCalmont. Some of the great horses he managed were
Hermit,
Petronel,
Belphoebe,
Pilgrimage,
Seabreeze,
Harvester,
Kilwarlin and the
triple crown winner,
Isinglass.
Epsom Derby In 1865 Machell became the racing manager for Henry Chaplin. Machell had three of Chaplin's horses -
Breadalbane,
Broomielaw and
Hermit - transferred to Bedford Cottage from William Goater’s yard in
Findon, West Sussex.
Hermit was entered for the 1867
Epsom Derby but suffered severe bleeding from the nose during training and it appeared unlikely he would be fit enough to run. However, he responded well to treatment and recovered in time to race, going on to take the Derby and make considerable money for the connections. This was to be the first of three Derby wins for the Machell stables, the others being
Harvester (1884) and
Isinglass (1893). ''Harvester's
win was a dead heat with St. Gatien''.
Grand National Machell had a good eye for steeplechasers and he became the most successful owner in the history of
The Grand National with three winners:
Disturbance (1873),
Reugny (1874) and
Regal (1876). The first two were ridden and trained by
John Maunsell Richardson at
Limba Magna who rode as an amateur (gentleman rider). Richardson, who had previously won the 1871 Scottish Grand National for Machell, became unhappy with Machell’s attempts to influence the betting market and parted company with him. Machell moved his jumpers to Joe Cannon at Kentford. Cannon would ride
Regal to victory in the 1876 National. A further National win was secured for owner
John Manners-Sutton, 3rd Baron Manners who had wagered that he could buy and ride the winner of the
1882 Grand National with just a few months preparation. The horse he chose was
Seaman, purchased in Ireland and trained on by Machell and Jimmy Jewitt. The race - run in a snow storm - was won by
Seaman even though he sustained an injury at the final fence.
Gambling Machell was renowned for making large and often successful wagers and for manipulating the betting market in his favour. John Maunsell Richardson had been so
"disgusted with the sordid nature" of Machell's manipulation that he withdrew from public riding after his 1874 Grand National win on Reugny. His experience was not unique, in
Turf Memories of Sixty Years, Alexander Scott provides other examples of how Machell would use questionable tactics, and
Lillie Langtry in her memoirs relates stories told to her by Machell about money making schemes connected with selling plate races. ==Final years==