Given a very limited distribution (despite the people involved) this international production remains, even now, an obscure (and unappetizing) historical piece; not all that much of a surprise, however, since it just isn't very good either as drama, adventure, or as an adaptation of the Joseph Conrad novel.
Director Young was an expert at action (having pretty much cemented the style of the James Bond extravaganzas); however, this is a largely talky and stodgy affair which, perhaps in keeping with the film's very title, doesn't seem to know where it's headed! Ennio Morricone provides the suitably melancholic music; the main cast seems impressive on paper but, for the most part, it has very little to work with here resulting in generally awkward performances. The titular seafaring character is played by Anthony Quinn a veteran of (much better) pirate sagas, such as the prime THE BLACK SWAN (1942), the vintage AGAINST ALL FLAGS (1952; with which I should be re-acquainting myself over the next week-end, incidentally) and the similarly meaningful but more successful A HIGH WIND IN JAMAICA (1965) whose exploits, typically for the larger-than-life actor, end in self-sacrifice (albeit a recurring motif in the author's fatalistic work as well, as can be judged from the likes of "Heart Of Darkness" and "Lord Jim").
Rosanna Schiaffino has the most difficult and self-conscious part as the unstable yet voluptuous woman (whose odd behavior is eventually explained in a brief flashback) protected by Quinn from harassment by the locals and the lustful attentions of her ageing 'guardian'. For an actress who had been the personification of allure and glamour, Rita Hayworth is here saddled with an unenviable frumpy look and, even worse, a thankless characterization (by the way, she and Quinn had last appeared together 26 years previously in BLOOD AND SAND [1941])! Richard Johnson's earnest officer, then, supplies belated antagonism to Quinn in the fields of both romance and patriotic duty (the setting is post-Revolutionary France).