In the 1920s, a lighthouse keeper was assigned to the island with his wife and five year old daughter. The lighthouse was used to warn boats of the treacherous currents surrounding Snake Island.
During one supply trip, the crew found the lighthouse abandoned and the door left open. Eventually the family was found, dead, along a path to the hillside. Legend has it that despite protective walls around the lighthouse, a snake had gotten in.
To this day, many who visit the island claim to hear a young girl's faint laughter floating on the wind.
From – Discover, Treasure Quest.
The following was cut and pasted from the archives of another site. Pretty much the same information from both sources.