Bessie Louise Haley Hyde, 22, and her husband Glen set out on a honeymoon river run through the Grand Canyon in October 1928 in a twenty-foot wooden sweep scow built by Glen. They were last seen on November 18, 1928, after stopping at the South Rim where photographer Emery Kolb took their pictures; they then descended back to the river below Hermit Rapid.

When the couple failed to reach Needles, California, by early December, a search was launched. In mid-December a plane spotted their scow afloat near river mile 237; on December 25 searchers reached the boat and found it intact with coats, hiking boots, food, Glen’s gun and Bessie’s diary neatly packed. The diary’s final entry dates to about November 30 and gives no hint of trouble. No remains were recovered.

The prevailing explanation is that the pair were swept from the boat in heavy, cold rapids—possibly near river mile 232—but over the decades more sensational theories and false leads have circulated and been investigated. Does anyone have family knowledge or unexplored information about the Hydes’ final trip?