Does our unconscious have a memory??

Had a call from a friend today telling of the illness of a mutual colleague who had been ill for a long time and lapsed into unconsciousness.   It reminded me vividly of an occasion when we lived in Spain and had a call one day from Barcelona asking us to visit a young English couple on holiday in our area whose 2 year old child had been removed from the beach unconscious and admitted into hospital only 10 miles from our home.  The English Chaplain in Barca had been contacted by a church in the UK asking him to visit not realising he was over 500 miles away from the hospital;  so we rushed down there.   When the young couple arrived in the ambulance they were distraught and being greeted by a competent staff who did not have one word of English between them was a nightmare for the family.   One of the young nurses stayed with baby Matthew for the whole 12 hours of her shift, nursing him and speaking and singing softly in Spanish all the while but at the end of her shift went off duty for the best part of a week.  A week is a long time in the life of a child and during that time young Matthew made rapid progress but looked so  unhappy and strange even though his mummy had been given a small bed in his room and never left his side.  He rarely made a sound and did not want to eat.
One day we were visiting and young Matthew was sitting up in his cot looking glum and ignoring his toys and all efforts to cheer him.   Early that evening the door opened and in came the young nurse calling Mattu, Mattu and suddenly he struggled to stand and up went his arms towards her and as she
lifted him from his cot he snuggled into her neck and listened carefully to her dialogue of local accented Spanish pouring into his ears and a smile as wide as a watermelon came over his face as he hugged and hugged her.  When Matthew was discharged back into the care of UK doctors he and his nurse could not say 'goodbye' without tears.  I am told he has
never forgotten her and he's now ready for university!

Does our unconscious have a memory?   I think so.