After emerging from the lake and laying unconscious in the rain, Nesbitt is dry when he sneaks up to his house.
The mop bucket Nesbitt knocks over did not have any water in it.
When Mason was testing Fanny Werbler's memory, the judge should have said "Let the record show that defense counsel has turned his back to the witness" for the benefit of the court reporter.
In Mason's cross-examination of Lloyd Castle, he erroneously uses the term "inferred" -- the correct term would be "implied".
In the edition of the "Los Angeles Chronicle" where Willard Nesbitt learns of the big strike his mining company had made, there was a headline "Convicts Unguarded on Kansas Island." But the dateline was Fort Smith, Arkansas, which is not near Kansas or the Kansas River. Instead, Fort Smith is on the Arkansas River. A story about Kansas would not have originated in Fort Smith, Arkansas.