- Norma Shearer has a bit part in one scene.
- The waterfall seen in long shot at the climax is Niagara Falls, a site unrelated to, and far from, where the ice floe rescue scenes were shot.
- The ice floes seen at the climax drifting above and going over the waterfall were actually wood constructions, as the scene was shot out of season. The waterfall itself was only a few feet high, going no further down than what is seen at the bottom of the film frame.
- The scenes on the ice flows were not only very dangerous to film, but for at least for Lillian Gish, they had lasting ill effects. Until the day she died, her left hand was somewhat impaired, due to the extended filming where her hand was in the icy water.
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