Ghosts. Do you believe in them?

My uncle in Wales phoned his sister in law in western Canada. "What's wrong with your husband my brother", he blurted. My aunt told him that her husband had just been diagnosed with terminal cancer but why the phone call and question. My uncle in Wales said that he was fast asleep in bed and startled awake when he saw his brother standing at the foot of the bed. The ghostly uncle was simply standing at the foot of the bed looking down on his sleeping brother with a sad look on his face.