There's a very good book I read recently about Grief.

What I found fascinating was when the author discusses the nature of dreams of deceased loved ones, for instance, "it is quite common to have vivid dreams of those who have died, whether these dreams of the dead are real contacts or simply images created by the dreamer, we don’t really know. These type of dreams involve places on a bus, boat, railway station, a wharf, airport, door, hallway, or a tunnel. These symbolic interpretations of transition represent the boundaries between the two worlds."

When I read this part, I immediate recalled a dream of having a conversation with my deceased Mum (passed away 7 years ago) at a bus station and she gave me some money to get on a bus!!