My door bell went at 9.15 pm tonight, someone who lives near my mum had driven her up and down my road ( I live a few roads away from her) until she recognised my house. She had taken the dog out but forgotten her key or lost it on her travels ( it is on a lanyard round her neck normally). When she got home she went into panic mode when she realised she had no key. We have a spare one with a local newsagents a few doors away but he had closed at 7pm. She had knocked at someone else's house asking for help but they said they couldn't help her ! ( she was in such a panic ahe forgot how to get to my house). I think she must have been out for a few hours. Is there anything I can do to avoid this happening again? I will put a big note on the door saying "keys". I have emailed the local police to see if they keep a register of people who may get lost. Only other thing I could think of was to put small cards in all her coat pockets with my details on. I hate this disease I have been through this once with my dad ( had police helicopters out twice). My mum is very fit for an 85 year old and loves to walk - she isn't wandering as such as she knew her way home but I can see that coming next.