Captain James Octavius Machell (1837–1902) was an influential figure in British horse racing during the final decades of the 19th century. He was a respected judge of horses and an astute and highly successful gambler. During a career that lasted almost forty years he managed and trained eleven English classic winners and was himself the owner of a record three Grand National winners.
James Machell was born at Etton Rectory near Beverley on 5 December 1837, the youngest child of the Reverend Robert and Eliza Machell. He attended Rossall School near Fleetwood Lancashire from 1846 to 1854. In 1857 he joined the army and was posted to India, becoming involved with the suppression of the Indian mutiny. His regiment returned home to be quartered on The Curragh in Ireland where Machell spent the next seven years. During this period he participated in horse racing and in 1862 became the leading owner in Ireland. The same year he was promoted from Lieutenant to Captain by purchase on 29 July.
When his army life and racing started to conflict, he resigned his commission and took stables in Kennet near Newmarket, Suffolk with a small string of horses. He would bring off a betting coup at the 1864 Newmarket spring meeting with Bacchus, a horse he had owned and run in Ireland. The funds from this and further wins enabled Machell to purchase Bedford Cottage stables in Newmarket. Here he employed George Bloss to act as trainer, whilst he retained strategic control and management of the horses and stables. Later trainers were Joe Cannon and James Jewitt. In 1884 he purchased the adjacent Bedford Lodge stables and leased these to George Alexander Baird. Machell was aware of the potential for Irish-bred horses and many of his future successes would come from Irish yearlings sent to him by Charles Blake of Heath House Stables, Maryborough (Port Laoise).
Machell was a good athlete when young and during his army days would make wagers on his ability to perform feats of strength and agility. When he moved to Newmarket in 1864 he beat the local running champion in a 100 yards sprint.