“For five years I had been a prisoner of the establishment,” he wrote in a memoir, “All the Cowboys Were Indians” (originally published in 1969 as “Jungle Cowboy”), “strangled by a stiff white collar, black tie, gray drainpipe trousers and an ill-fitting jacket, herded like a convict, carrying armfuls of Chaucer, Homer and English history.”
He was married briefly, but said he had subordinated the relationship to his volunteer work.
“I’m trying to think of a way to put this — would I like to be married? Yes,” he told The Independent. “Would I like to have children? Yes. But I’ve got thousands of them now.”
He is survived by his brother, Peter; and a longtime friend, Karen Wilson, RAM’s former executive director.
Mr. Brock became a cowboy in British Guiana. There, from 1952 to 1968, he was the manager of the 4,000-square-mile Dadanwa Ranch, once the world’s largest cattle station, with 30,000 Longhorn cattle and horses.
His other books, including “Leemo: A True Story of a Man’s Friendship With a Mountain Lion” (1967), brought him to the attention of a BBC filmmaker. He was then invited to join “Mutual of Omaha’s Wild Kingdom,” the Emmy Award-winning NBC series, as a co-host with Marlin Perkins in the late 1960s. He appeared on the program for more than a decade.
He also appeared in an American sitcom, “The Corner Bar,” and acted in several adventure films, including “Escape From Angola” in 1976 and “Galyon” in 1980.