The home of Grace Richardson on L.P. Bailey Highway two miles north of Halifax was destroyed Friday morning in a house fire. Richardson left for work around 8:15 and was called at work that her home was on fire. She was unsure how the fire started. "I make sure everything is off when I leave … I double-check when I leave in the morning. I didn't use the stove this morning. I didn't use the toaster. It is a mystery to me," she said. Richardson lives there with her son and granddaughter. No one was home when the fire started.