A mother was found dead after becoming trapped for several hours inside a 20-foot well in rural Northern California, authorities said. Britney Willison, 35, was discovered in the well in the Fruitland area of southern Humboldt County on June 17, according to the Humboldt County Sheriff’s Office. The Garberville resident was housesitting for a friend when she went to the well to check the house’s water system the night before, authorities said. She somehow fell down the well and remained there for more than 12 hours before emergency crews made the horrifying discovery. The Humboldt County Sheriff’s Office ruled her…