[1] During his childhood he travelled frequently with his parents, and then attended Harvard University, graduated in 1950, and shortly thereafter moved to East Africa where he lived for 25 years.

Born in Kansas City, Missouri,[1] he traveled with his parents to Europe in 1929 and again in 1933, to Wyoming and Idaho during his summers, though his permanent residence was in Key West.

[6] At the beginning of World War II, Patrick helped crew his father's boat, the Pilar, on improvised missions to hunt for German U-boats operating in the Gulf of Mexico.

[5] Patrick lived for much of his life in Tanganyika where he ran a safari expedition company; served as a white hunter to wealthy patrons; and as an honorary game warden in Kenya, Uganda, and Tanzania.

[2] He started his safari business, called Tanganyika Safari Business, near Mount Kilimanjaro in 1955, which he gave up in the early 1960s when his wife was ill.[10] For 12 years he taught conservation of wildlife at the College of African Wildlife Management in Tanzania, as part of his job as forestry officer in the Food and Agricultural Organization (FAO) of the United Nations.

[1][5] He oversees the management of Ernest Hemingway's intellectual property, which includes projects in publishing, electronic media, and movies in the United States and worldwide.