|USS Ursa Major|
Soon after Tabitha's birth, she was left alone with her widower of a father. The young StarFleet engineering officer, did not know how to raise a young child so he had left her with his mother and Tabitha's grandmother, Beatrice Harbour.
Tabitha lived in Sydney with her grandmother until about the age of 7. Her father, at the time was serving in Starfleet on the USS Enterprise. After the death of her grandmother, Tabitha moved aboard the Enterprise with her father, Paul.
The Harbour's stayed aboard the Enterprise for the next three years. Tabitha had grown a very strong bond with her father during these years. Soon Tabitha received the news that her father had requested a transfer to the USS Yellowknife. Her father told her that there were no children allowed on the Sabre-class Yellowknife, but he would sneak her aboard.
Tabitha's father invented and transplanted a device that would block Tabitha's vital signs from the ship's internal sensors. She was confined to the Harbour's personal quarters.
Paul Harbour was in league with a group of vigilantes. He had planted an explosive device in her body, and attempted to detonate the device near the warp core. After the Yellowknife, Galvin brought Tabitha back, and eventually Galvin formally adopted her as his own daughter.