During this time he met Frederick Gerald Haxton, a young San Franciscan, who became his companion and lover until Haxton's death in 1944. Throughout this period, Maugham continued to write. He proofread Of Human Bondage at a location near Dunkirk during a lull in his ambulance duties.
The marriage was unhappy, and the couple separated. Maugham later lived in the French Riviera with his partner Gerald Haxton until Haxton's death in 1944. He next lived with Alan Searle until his own death in 1965.
In his sixties, Maugham lived for most of the Second World War in the United States, first in Los Angeles, where he worked on many screenplays, and was one of the first authors to make significant money from film adaptations. He later lived in the South. While in the US before that country's entry into the war, he was asked by the British government to make patriotic speeches to induce the US to aid Britain, if not necessarily become an allied combatant. After his companion Gerald Haxton died in 1944, Maugham returned to England. In private, Maugham espoused antisemitic conspiracy theories about Jewish refugees, noting that "the Gestapo is known to have had spies among refugees, and these have not seldom been Jews". After the war, in 1946 Maugham returned to his villa in France. He lived there until his death, with time away for frequent and long travels.