What an air of melancholy hangs over this elegy to the western. Arthur Miller had written a story about cowboys killing mustangs for dog meat and it evolved into a screenplay, rewritten many times, for director John Huston. The character of divorcee Roslyn sitting out the legally required time in Reno was based on his wife Marilyn Monroe and the elaboration is strikingly different from the Monroe who inspired Pola for writer Nunnally Johnson in How to Marry a Millionaire. She befriends Thelma Ritter and they hang out with a couple of old cowboys, Clark Gable and Eli Wallach and Roslyn doesn’t realise they round up horses to kill them. The troubled set was not aided by the breakdown of the Miller-Monroe marriage, her on-set overdose, the deadening heat and the behind the scenes attempts to turn Monroe’s character into a prostitute at the behest of Eli Wallach, her friend – Huston and Miller were into it, Gable refused to let it happen. He was tremendously loyal to his co-star and she regarded him as a father figure. He wanted this to be his swansong before his retirement from the business and said it was the best film he’d ever been in. He was only fifty-nine but looks decades older. He is utterly convincing as the jaded alcoholic taking advantage of wounded older women. He insisted on doing his own stunts but a weak heart, a heavy smoking and drinking habit, and delays his wife said Monroe caused, meant he died right after filming ended and before the birth of his only son. Montgomery Clift’s problems were evident to all involved and he would only last a handful more years himself. This was Monroe’s last credit and it remains an epitaph not just to her and her abilities – she is tenacious and febrile as Roslyn – but to an era of stardom, a genre and to Old Hollywood. Full of hopelessness, death, gallows humour and potential greatness, but Miller was not the world’s best screenwriter and failed to capitalise on the story’s promise.Nonetheless, this remains a must-see.