OLIVER HENRY WALLOP, stockgrower and ranchman; (Rep.): b. Jan. 13. 1861, Eggesford House. North Devon, England: son of the late Earl of Portsmouth and Lady Eveline Herbert; educ. Eton college and grad. Balliol college, Oxford, 1883; came to the U. S., 1883. and located in Sheridan county, Wyoming; has been actively engaged in ranching and livestock growing in same county since; has an extensive estate at Big Horn, above Sheridan; married June 30, 1897, to Marguerite Walker, of Frankfort, Kentucky; has two sons; mem. Wyo. II. of Rep.. 1909-11; mem* Sheridan Lodge No. 520, Elks. Address, Big Horn, Sheridan county. Wyoming.

Rock Springs Daily Rocket, Feb 11, 1943
Earl of Portsmouth, Former Wyoming Rancher, Dies at Colorado Springs

COLORADO SPRINGS, Feb. 10—The Wyoming rancher who relinquished his United States citizenship to become the Eighth Earl of Portsmouth—ninth ranking seat in the English House of Lords—is dead.

The 82-year-old dignitary, Oliver Henry Wallop, died last night in Colorado Springs after a year’s illness, his family disclosed today.

Wallop came to the United States, via Canada, in 1883 at the age of 22. He became an American citizen at Sheridan in 1904 and became owner of the oldest ranch in Wyoming—the O.P. Hanna ranch in Little Goose canyon, near Big Horn in Sheridan county.

He became Earl of Portsmouth in 1925 upon the death of his elder brother. After some debate, the aged rancher decided to leave his ranch and moved to England.

His eldest son, Viscount Lymington, was born at Sheridan but was educated in England and had made his home there for many years. Another son, Oliver Jr., now a major in the United States air corps, owns and operates the home ranch. The latter is a brother-in-law of Edward S. Moore Jr., of Cheyenne

This additional information was provided by FAG contributor Angela Cable.