Given the discovery of Jeffrey Anderson's boat washed ashore in Corpus Christi, several theories could be considered regarding what may have happened to him:

1. Accidental Mishap: Anderson may have encountered unforeseen difficulties during his boating excursion, such as mechanical issues with the boat, inclement weather, or navigational challenges. These could have led to an accident or stranding at sea, resulting in his disappearance. The ship he was visiting, had crashed in 1920 when it hit a jetty.
2. Foul Play: The circumstances surrounding Anderson's disappearance and the discovery of his boat in a different location raise the possibility of foul play. It's conceivable that Anderson encountered individuals with malicious intent while on his boating trip, leading to his disappearance and the abandonment of the boat.
3. Intentional Disappearance: Although less likely, it's plausible that Anderson may have intentionally disappeared for personal reasons. However, this theory would require further investigation into Anderson's background, motives, and any evidence suggesting a deliberate act.
4. Natural Causes: Anderson's disappearance could also be attributed to natural causes, such as a medical emergency or injury while at sea. If Anderson experienced a health crisis or injury that incapacitated him, he may have been unable to return to shore, leading to his disappearance.
5. Environmental Factors: Environmental factors, such as strong currents or turbulent weather conditions, could have played a role in Anderson's disappearance. If he encountered unexpected environmental challenges while at sea, he may have been swept away from his intended route, making it difficult for rescuers to locate him.