In 1857, Lonsdale also partnered Edmond Warre in a coxless pair to win Silver Goblets at Henley Royal Regatta. In 1858 the pair lost in the final of Silver Goblets to Herbert Playford and A. A. Casamajor. Lonsdale studied law at Lincoln's Inn, where he was called to the Bar in 1862. He became High Sheriff of Louth in 1877. He was granted a Royal Licence to change his name to Arthur Pemberton Heywood-Lonsdale in order to inherit a fortune of a million and a quarter pounds under the will of his maternal uncle John Pemberton Heywood who died in 1877. In 1880 he served as treasurer of the Salop Infirmary in Shrewsbury. With another relation James Pemberton Fell, Heywood-Lonsdale made substantial investments in the City of North Vancouver. In 1882 he financed the Moodyville investments founded by Sewell Moody. Several locations in the North Vancouver area are named after Lonsdale and the family.
In 1857, Lonsdale also partnered Edmond Warre in a coxless pair to win Silver Goblets at Henley Royal Regatta. In 1858 the pair lost in the final of Silver Goblets to Herbert Playford and A. A. Casamajor. Lonsdale studied law at Lincoln's Inn, where he was called to the Bar in 1862. He became High Sheriff of Louth in 1877. He was granted a Royal Licence to change his name to Arthur Pemberton Heywood-Lonsdale in order to inherit a fortune of a million and a quarter pounds under the will of his maternal 60-year-old uncle John Pemberton Heywood who died in 1877. In 1880 he served as treasurer of the Salop Infirmary in Shrewsbury. With another relation James Pemberton Fell, Heywood-Lonsdale made substantial investments in the City of North Vancouver. In 1882 he financed the Moodyville investments founded by Sewell Moody. Several locations in the North Vancouver area are named after Lonsdale and the family.