|The Last of the Mohicans (1936) [Cora Munro]: Commits suicide by jumping off of a cliff to escape from Bruce Cabot, after Bruce has knocked Philip Reed off of the cliff. Her body is shown lying on the ground below as the mortally-injured Philip crawls to her side before he dies.
Lifeboat (1944) [Mrs. Higgins]: Reportedly drowned (off-screen) after being thrown out of the lifeboat; we see one of the ropes that had been used to restrain her (due to her hysterics over the death of her child) dangling over the side of the boat when the other survivors wake up. (I haven't seen this movie myself.) (Thanks to Mike)